diff --git a/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/model/PersonApiSyncOptions.java b/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/model/PersonApiSyncOptions.java
index 382a18b..1733796 100644
--- a/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/model/PersonApiSyncOptions.java
+++ b/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/model/PersonApiSyncOptions.java
@@ -3,7 +3,9 @@ package com.budwk.app.zhgh.personGovernance.apiConfig.model;
 import lombok.Data;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 @Data
 public class PersonApiSyncOptions {
@@ -11,11 +13,22 @@ public class PersonApiSyncOptions {
     private String unitConfigId;
     private List<FieldRule> rules = new ArrayList<>();
 
+    public Map<String, String> fieldDefaults() {
+        Map<String, String> defaults = new HashMap<>();
+        for (FieldRule rule : rules) {
+            if (rule.getDefaultValue() != null && !rule.getDefaultValue().isEmpty()) {
+                defaults.put(rule.getTargetField(), rule.getDefaultValue());
+            }
+        }
+        return defaults;
+    }
+
     @Data
     public static class FieldRule {
         private String sourceField;
         private String targetField;
         private Integer length;
         private String dictCode;
+        private String defaultValue;
     }
 }
diff --git a/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/service/PersonApiConfigService.java b/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/service/PersonApiConfigService.java
index ed72914..fbce7fc 100644
--- a/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/service/PersonApiConfigService.java
+++ b/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/service/PersonApiConfigService.java
@@ -3,6 +3,7 @@ package com.budwk.app.zhgh.personGovernance.apiConfig.service;
 import com.budwk.app.base.page.Pagination;
 import com.budwk.app.base.param.PageForm;
 import com.budwk.app.base.service.BaseService;
+import com.budwk.app.sys.models.Sys_dict;
 import com.budwk.app.zhgh.personGovernance.apiConfig.model.PersonApiConfig;
 import com.budwk.app.zhgh.personGovernance.apiConfig.model.PersonApiSyncOptions;
 import com.budwk.app.zhgh.personGovernance.apiConfig.model.PersonApiFieldMapping;
@@ -33,6 +34,8 @@ public interface PersonApiConfigService extends BaseService<PersonApiConfig> {
 
     NutMap syncOptionChoices();
 
+    Sys_dict findUserFieldDictionary(String code);
+
     void deleteConfig(String id);
 
     List<NutMap> tableNames();
diff --git a/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/service/impl/PersonApiConfigServiceImpl.java b/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/service/impl/PersonApiConfigServiceImpl.java
index 302e470..f52800f 100644
--- a/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/service/impl/PersonApiConfigServiceImpl.java
+++ b/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/service/impl/PersonApiConfigServiceImpl.java
@@ -54,6 +54,8 @@ import java.util.regex.Pattern;
 @IocBean(args = {"refer:dao"})
 public class PersonApiConfigServiceImpl extends BaseServiceImpl<PersonApiConfig> implements PersonApiConfigService {
     private static final Pattern SAFE_IDENTIFIER = Pattern.compile("^[A-Za-z0-9_]+$");
+    private static final String SYNC_OPTIONS_CHUNKS = "@chunks:";
+    private static final String USER_FIELD_DICTIONARIES = "USER_TABLE_COLUMN_DICTS";
     /** JSON节点删除标记：Token接口未配置时，用于彻底移除数据请求中的Token字段或数组项。 */
     private static final Object OMIT_TOKEN_PARAMETER = new Object();
 
@@ -124,6 +126,12 @@ public class PersonApiConfigServiceImpl extends BaseServiceImpl<PersonApiConfig>
     @Aop(TransAop.READ_COMMITTED)
     public PersonApiConfig saveConfig(PersonApiConfig config, List<PersonApiFieldMapping> mappings,
                                       List<PersonApiRequestParam> params) {
+        return saveConfig(config, mappings, params, null);
+    }
+
+    private PersonApiConfig saveConfig(PersonApiConfig config, List<PersonApiFieldMapping> mappings,
+                                       List<PersonApiRequestParam> params, PersonApiSyncOptions options) {
+        Map<String, String> defaults = options == null ? java.util.Collections.emptyMap() : options.fieldDefaults();
         Assert.notNull(config, "配置不能为空");
         Assert.hasText(config.getConfigName(), "请填写配置名称");
         PersonApiConfig stored = Strings.isBlank(config.getId()) ? null : fetch(config.getId());
@@ -146,8 +154,8 @@ public class PersonApiConfigServiceImpl extends BaseServiceImpl<PersonApiConfig>
         mappings = mappings == null ? new ArrayList<>() : mappings;
         if (Boolean.TRUE.equals(config.getEnabled())) {
             Assert.hasText(config.getTargetTable(), "启用同步任务前请选择目标表");
-            Assert.isTrue(mappings.stream().anyMatch(mapping -> Strings.isNotBlank(mapping.getSourceField())
-                    && Strings.isNotBlank(mapping.getTargetField())), "启用同步任务前请至少完成一条来源字段与目标字段的映射");
+            Assert.isTrue(mappings.stream().anyMatch(mapping -> Strings.isNotBlank(mapping.getTargetField())
+                    && hasMappingValue(mapping, defaults)), "启用同步任务前请至少配置一条字段映射或默认值");
         }
         PersonApiFieldMapping identity = mappings.stream()
                 .filter(v -> Boolean.TRUE.equals(v.getIdentityFlag()))
@@ -168,7 +176,7 @@ public class PersonApiConfigServiceImpl extends BaseServiceImpl<PersonApiConfig>
             Assert.isTrue(isUnitConfig(config) && "UPSERT".equals(config.getSyncMode())
                     && "id".equals(config.getIdentityField()), "单位API配置必须使用存在即修改模式，并将来源单位编码映射到id作为唯一标识");
             Assert.isTrue(mappings.stream().anyMatch(mapping -> "name".equals(mapping.getTargetField())
-                    && Strings.isNotBlank(mapping.getSourceField())), "单位API配置必须映射单位名称name");
+                    && hasMappingValue(mapping, defaults)), "单位API配置必须映射单位名称name");
         }
         if ("HTTP_API".equals(config.getSourceType())) pagination(config, params);
 
@@ -240,6 +248,9 @@ public class PersonApiConfigServiceImpl extends BaseServiceImpl<PersonApiConfig>
                 }
                 dao().insert(params);
             }
+            if (options != null) {
+                saveSyncOptions(config.getId(), options);
+            }
             if (previousDataQueryResultKey != null
                     && !Objects.equals(previousDataQueryResultKey, config.getDataQueryResult())) {
                 deleteDataQueryResultQuietly(previousDataQueryResultKey);
@@ -267,32 +278,78 @@ public class PersonApiConfigServiceImpl extends BaseServiceImpl<PersonApiConfig>
         if (options != null) {
             validateSyncOptions(config, mappings, options);
         }
-        PersonApiConfig saved = saveConfig(config, mappings, params);
-        if (options != null) {
-            Sys_config settings = new Sys_config();
-            settings.setConfigKey(syncOptionsKey(saved.getId()));
-            settings.setConfigValue(Json.toJson(options));
-            settings.setNote("人员治理API同步选项");
-            dao().insertOrUpdate(settings);
-        }
-        return saved;
+        return saveConfig(config, mappings, params, options);
     }
 
     private String syncOptionsKey(String configId) {
         return "personGovernance.syncOptions." + configId;
     }
 
+    private void saveSyncOptions(String configId, PersonApiSyncOptions options) {
+        String key = syncOptionsKey(configId);
+        String value = Json.toJson(options);
+        // 同时遵守字符列宽和文本列的字节上限，按 Unicode 码点分段以保留完整字符。
+        List<NutMap> column = listMap(Sqls.create("SELECT LEAST(CHARACTER_MAXIMUM_LENGTH, "
+                + "FLOOR(CHARACTER_OCTET_LENGTH / 4)) valueLength FROM information_schema.COLUMNS "
+                + "WHERE TABLE_SCHEMA=DATABASE() AND TABLE_NAME='sys_config' AND COLUMN_NAME='configValue'"));
+        Assert.isTrue(!column.isEmpty() && column.get(0).getInt("valueLength") > 0, "无法读取系统配置值列宽");
+        int limit = column.get(0).getInt("valueLength");
+        int remaining = value.codePointCount(0, value.length());
+        List<Sys_config> chunks = new ArrayList<>();
+        if (remaining > limit) {
+            int offset = 0;
+            while (remaining > 0) {
+                int size = Math.min(limit, remaining);
+                int end = value.offsetByCodePoints(offset, size);
+                chunks.add(syncOptionsRow(key + "." + (chunks.size() + 1), value.substring(offset, end)));
+                offset = end;
+                remaining -= size;
+            }
+            value = SYNC_OPTIONS_CHUNKS + chunks.size();
+            Assert.isTrue(value.length() <= limit, "系统配置值列宽不足以保存分段标记");
+        }
+        dao().insertOrUpdate(syncOptionsRow(key, value));
+        dao().clear(Sys_config.class, Cnd.where("configKey", "like", key + ".%"));
+        if (!chunks.isEmpty()) dao().insert(chunks);
+    }
+
+    private Sys_config syncOptionsRow(String key, String value) {
+        Sys_config settings = new Sys_config();
+        settings.setConfigKey(key);
+        settings.setConfigValue(value);
+        settings.setNote("人员治理API同步选项");
+        return settings;
+    }
+
     @Override
     public PersonApiSyncOptions syncOptions(String configId) {
-        Sys_config settings = dao().fetch(Sys_config.class, syncOptionsKey(configId));
-        return settings == null ? new PersonApiSyncOptions()
-                : Json.fromJson(PersonApiSyncOptions.class, settings.getConfigValue());
+        String key = syncOptionsKey(configId);
+        Map<String, String> values = new LinkedHashMap<>();
+        dao().query(Sys_config.class, Cnd.where("configKey", "=", key).or("configKey", "like", key + ".%"))
+                .forEach(settings -> values.put(settings.getConfigKey(), settings.getConfigValue()));
+        String value = values.get(key);
+        if (value == null) return new PersonApiSyncOptions();
+        if (value.startsWith(SYNC_OPTIONS_CHUNKS)) {
+            int chunkCount = Integer.parseInt(value.substring(SYNC_OPTIONS_CHUNKS.length()));
+            Assert.isTrue(chunkCount > 0 && chunkCount == values.size() - 1, "人员治理同步选项分段不完整");
+            StringBuilder json = new StringBuilder();
+            for (int i = 1; i <= chunkCount; i++) {
+                String chunk = values.get(key + "." + i);
+                Assert.notNull(chunk, "人员治理同步选项分段不完整");
+                json.append(chunk);
+            }
+            value = json.toString();
+        }
+        return Json.fromJson(PersonApiSyncOptions.class, value);
     }
 
     @Override
     public NutMap syncOptionChoices() {
+        Sys_dict root = userFieldDictionaryRoot();
+        List<Sys_dict> dictionaries = root == null ? List.of()
+                : dao().query(Sys_dict.class, Cnd.where("parentId", "=", root.getId()).asc("name"));
         return NutMap.NEW()
-                .addv("dicts", dao().query(Sys_dict.class, Cnd.where("parentId", "=", "").or("parentId", "is", null).asc("name")))
+                .addv("dicts", dictionaries)
                 .addv("unitConfigs", dao().query(PersonApiConfig.class,
                         Cnd.where("sourceType", "=", "HTTP_API").and("targetTable", "=", "sys_unit")
                                 .and("syncMode", "=", "UPSERT").and("identityField", "=", "id")
@@ -300,10 +357,26 @@ public class PersonApiConfigServiceImpl extends BaseServiceImpl<PersonApiConfig>
                         .map(item -> NutMap.NEW().addv("id", item.getId()).addv("configName", item.getConfigName())).toList());
     }
 
+    private Sys_dict userFieldDictionaryRoot() {
+        return dao().fetch(Sys_dict.class, Cnd.where("code", "=", USER_FIELD_DICTIONARIES));
+    }
+
+    @Override
+    public Sys_dict findUserFieldDictionary(String code) {
+        Sys_dict root = userFieldDictionaryRoot();
+        return root == null ? null : dao().fetch(Sys_dict.class,
+                Cnd.where("parentId", "=", root.getId()).and("code", "=", code));
+    }
+
     private boolean isUnitConfig(PersonApiConfig config) {
         return "HTTP_API".equals(config.getSourceType()) && "sys_unit".equalsIgnoreCase(config.getTargetTable());
     }
 
+    private boolean hasMappingValue(PersonApiFieldMapping mapping, Map<String, String> defaults) {
+        return Strings.isNotBlank(mapping.getSourceField())
+                || (mapping.getTargetField() != null && defaults.containsKey(mapping.getTargetField()));
+    }
+
     private void validateSyncOptions(PersonApiConfig config, List<PersonApiFieldMapping> mappings, PersonApiSyncOptions options) {
         if (Strings.isNotBlank(options.getUnitConfigId())) {
             PersonApiConfig unitConfig = fetch(options.getUnitConfigId());
@@ -311,29 +384,40 @@ public class PersonApiConfigServiceImpl extends BaseServiceImpl<PersonApiConfig>
                     && !Boolean.TRUE.equals(unitConfig.getDelFlag()) && isUnitConfig(unitConfig)
                     && "UPSERT".equals(unitConfig.getSyncMode()) && "id".equals(unitConfig.getIdentityField()),
                     "请选择有效的单位API配置");
-            Assert.isTrue(mappings != null && mappings.stream().anyMatch(mapping -> "unitId".equals(mapping.getTargetField())
-                    && Strings.isNotBlank(mapping.getSourceField())), "自动同步单位需要配置unitId映射");
         }
         Assert.notNull(options.getRules(), "字段配置不能为空");
         java.util.Set<List<String>> ruleFields = new java.util.HashSet<>();
         for (PersonApiSyncOptions.FieldRule rule : options.getRules()) {
             Assert.notNull(rule, "字段配置不能为空");
-            Assert.hasText(rule.getSourceField(), "请填写配置规则的来源字段");
-            Assert.isTrue(ruleFields.add(List.of(rule.getSourceField(), Strings.sNull(rule.getTargetField()))),
+            boolean hasDefault = rule.getDefaultValue() != null && !rule.getDefaultValue().isEmpty();
+            if (rule.getLength() != null || !hasDefault) {
+                Assert.hasText(rule.getSourceField(), "请填写配置规则的来源字段");
+            }
+            Assert.isTrue(ruleFields.add(List.of(Strings.sNull(rule.getSourceField()), Strings.sNull(rule.getTargetField()))),
                     "同一来源字段和目标字段只能配置一条规则");
             Assert.isTrue(rule.getLength() == null || rule.getLength() >= 0, "字段长度必须为非负整数");
-            Assert.isTrue(mappings != null && mappings.stream().anyMatch(mapping ->
-                    Objects.equals(mapping.getSourceField(), rule.getSourceField())
-                            && Objects.equals(Strings.sNull(mapping.getTargetField()), Strings.sNull(rule.getTargetField()))),
-                    "字段规则必须关联一条字段映射");
+            PersonApiFieldMapping mapping = mappings == null ? null : mappings.stream().filter(item ->
+                    Objects.equals(Strings.sNull(item.getSourceField()), Strings.sNull(rule.getSourceField()))
+                            && Objects.equals(Strings.sNull(item.getTargetField()), Strings.sNull(rule.getTargetField())))
+                    .findFirst().orElse(null);
+            Assert.notNull(mapping, "字段规则必须关联一条字段映射");
+            if (hasDefault) {
+                Assert.hasText(rule.getTargetField(), "设置默认值前请选择目标字段");
+                Assert.isTrue(!List.of("id", "pullTime").contains(rule.getTargetField())
+                        && !Boolean.TRUE.equals(mapping.getIdentityFlag()), "主键、批次时间和唯一标识不能设置默认值");
+            }
             if (Strings.isNotBlank(rule.getDictCode())) {
                 Assert.hasText(rule.getTargetField(), "选择字典前请填写目标字段");
                 Assert.isTrue(!"pullTime".equals(rule.getTargetField())
                         && (!"id".equals(rule.getTargetField()) || isUnitConfig(config)), "系统生成字段不能配置字典");
-                Assert.notNull(dao().fetch(Sys_dict.class, Cnd.where("code", "=", rule.getDictCode())
-                        .and(Cnd.exps("parentId", "=", "").or("parentId", "is", null))), "字典分类不存在");
+                Assert.notNull(findUserFieldDictionary(rule.getDictCode()), "用户表字段字典下不存在该分类：" + rule.getDictCode());
             }
         }
+        if (Strings.isNotBlank(options.getUnitConfigId())) {
+            Map<String, String> defaults = options.fieldDefaults();
+            Assert.isTrue(mappings != null && mappings.stream().anyMatch(mapping -> "unitId".equals(mapping.getTargetField())
+                    && hasMappingValue(mapping, defaults)), "自动同步单位需要配置unitId映射");
+        }
     }
 
     @Override
@@ -350,7 +434,8 @@ public class PersonApiConfigServiceImpl extends BaseServiceImpl<PersonApiConfig>
         PersonApiConfig config = fetch(id);
         config.setEnabled(false);
         reconcileTask(config);
-        dao().delete(Sys_config.class, syncOptionsKey(id));
+        String key = syncOptionsKey(id);
+        dao().clear(Sys_config.class, Cnd.where("configKey", "=", key).or("configKey", "like", key + ".%"));
     }
 
     @Override
diff --git a/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/service/impl/PersonGovernanceSyncServiceImpl.java b/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/service/impl/PersonGovernanceSyncServiceImpl.java
index 8db2705..54cfe96 100644
--- a/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/service/impl/PersonGovernanceSyncServiceImpl.java
+++ b/src/main/java/com/budwk/app/zhgh/personGovernance/apiConfig/service/impl/PersonGovernanceSyncServiceImpl.java
@@ -101,6 +101,7 @@ public class PersonGovernanceSyncServiceImpl implements PersonGovernanceSyncServ
             List<PersonApiFieldMapping> mappings = dao.query(PersonApiFieldMapping.class,
                     Cnd.where("configId", "=", configId).asc("sort"));
             PersonApiSyncOptions options = personApiConfigService.syncOptions(configId);
+            Map<String, String> fieldDefaults = options.fieldDefaults();
             boolean unitTarget = "sys_unit".equalsIgnoreCase(config.getTargetTable());
             if (unitTarget) {
                 // 单位写入可能随父批次一起提交，行锁一直持有到外层事务完成。
@@ -117,9 +118,10 @@ public class PersonGovernanceSyncServiceImpl implements PersonGovernanceSyncServ
                             rule.getLength() != null && Strings.isBlank(rule.getTargetField())
                                     && Objects.equals(rule.getSourceField(), m.getSourceField())))
                     .filter(m -> Boolean.TRUE.equals(m.getRequired())
-                            || (Strings.isNotBlank(m.getSourceField()) && Strings.isNotBlank(m.getTargetField())))
+                            || (Strings.isNotBlank(m.getTargetField())
+                                && (Strings.isNotBlank(m.getSourceField()) || fieldDefaults.containsKey(m.getTargetField()))))
                     .toList();
-            List<NutMap> columns = validateTarget(config, mappings);
+            List<NutMap> columns = validateTarget(config, mappings, fieldDefaults);
             log.info("[人员同步] 目标表和字段映射校验完成，configId={}，batchNo={}，targetTable={}，mappingCount={}，columnCount={}",
                     configId, batch.getBatchNo(), config.getTargetTable(), mappings.size(), columns.size());
             if ("SYSTEM_TABLE".equals(config.getSourceType())) {
@@ -161,7 +163,7 @@ public class PersonGovernanceSyncServiceImpl implements PersonGovernanceSyncServ
                 }
                 log.info("[人员同步] 开始字段映射转换及目标表批量写入，configId={}，batchNo={}，sourceCount={}，mappingCount={}",
                         configId, batch.getBatchNo(), rows.size(), mappings.size());
-                insertPage(config, mappings, columns, rows, batch, lockKey, owner, options, dictionaryValues, unitIds);
+                insertPage(config, mappings, columns, rows, batch, lockKey, owner, options, dictionaryValues, unitIds, fieldDefaults);
                 applySyncOptions(config, options, dictionaryValues, unitIds);
                 log.info("[人员同步] 目标表批量写入完成，configId={}，batchNo={}，successCount={}，newCount={}，changeCount={}，skipCount={}",
                         configId, batch.getBatchNo(), batch.getSuccessCount(), batch.getNewCount(),
@@ -201,7 +203,7 @@ public class PersonGovernanceSyncServiceImpl implements PersonGovernanceSyncServ
                     if (!rows.isEmpty() && pageSize > 0) {
                         Assert.isTrue(fingerprints.add(DigestUtil.sha256Hex(Json.toJson(rows))), "接口重复返回同一页，已终止并回滚本批次");
                     }
-                    insertPage(config, mappings, columns, rows, batch, lockKey, owner, options, dictionaryValues, unitIds);
+                    insertPage(config, mappings, columns, rows, batch, lockKey, owner, options, dictionaryValues, unitIds, fieldDefaults);
                     // 按接口原始条数判定，已存在而跳过的记录仍属于这一页。
                     // 仅数量模式是单次限量查询，即使正好返回配置数量也不能继续构造下一页请求。
                     if (singleLimitRequest || pageSize == 0 || rows.size() < pageSize) break;
@@ -267,9 +269,8 @@ public class PersonGovernanceSyncServiceImpl implements PersonGovernanceSyncServ
         }
         boolean created = false;
         for (Map.Entry<String, Set<String>> entry : dictionaryValues.entrySet()) {
-            Sys_dict parent = dao.fetch(Sys_dict.class, Cnd.where("code", "=", entry.getKey())
-                    .and(Cnd.exps("parentId", "=", "").or("parentId", "is", null)));
-            Assert.notNull(parent, "字典分类不存在：" + entry.getKey());
+            Sys_dict parent = personApiConfigService.findUserFieldDictionary(entry.getKey());
+            Assert.notNull(parent, "用户表字段字典下不存在该分类：" + entry.getKey());
             // 同一字典分类下串行检查和插入，避免并发同步重复创建子项。
             Sql lock = Sqls.create("SELECT id FROM sys_dict WHERE id=@id FOR UPDATE").setParam("id", parent.getId());
             lock.setCallback(Sqls.callback.str());
@@ -374,7 +375,8 @@ public class PersonGovernanceSyncServiceImpl implements PersonGovernanceSyncServ
     }
 
     /** 校验目标表和业务唯一标识；数据库唯一约束由批量写入检查，冲突时整批回滚。 */
-    private List<NutMap> validateTarget(PersonApiConfig config, List<PersonApiFieldMapping> mappings) {
+    private List<NutMap> validateTarget(PersonApiConfig config, List<PersonApiFieldMapping> mappings,
+                                        Map<String, String> fieldDefaults) {
         Assert.hasText(config.getTargetTable(), "请选择目标人员中间表");
         List<NutMap> columns = personApiConfigService.columns(config.getTargetTable());
         Map<String, NutMap> fields = new HashMap<>();
@@ -387,14 +389,16 @@ public class PersonGovernanceSyncServiceImpl implements PersonGovernanceSyncServ
             Assert.isTrue("HTTP_API".equals(config.getSourceType()) && "UPSERT".equals(config.getSyncMode())
                     && "id".equals(config.getIdentityField()), "单位API必须按来源单位id新增或更新");
             Assert.isTrue(mappings.stream().anyMatch(mapping -> "name".equals(mapping.getTargetField())
-                    && Strings.isNotBlank(mapping.getSourceField())), "单位API配置必须映射单位名称name");
+                    && (Strings.isNotBlank(mapping.getSourceField()) || fieldDefaults.containsKey("name"))),
+                    "单位API配置必须映射单位名称name");
         }
         Assert.isTrue(fields.get("id").getString("columnType").toLowerCase(Locale.ROOT).contains("char"), "中间表id须支持字符串主键");
         Assert.notEmpty(mappings, "请配置字段映射");
         Set<String> targets = new HashSet<>();
         for (PersonApiFieldMapping mapping : mappings) {
-            Assert.hasText(mapping.getSourceField(), "请补全来源字段");
             Assert.hasText(mapping.getTargetField(), "请补全系统字段");
+            Assert.isTrue(Strings.isNotBlank(mapping.getSourceField()) || fieldDefaults.containsKey(mapping.getTargetField()),
+                    "请填写来源字段或默认值：" + mapping.getTargetField());
             Assert.isTrue(fields.containsKey(mapping.getTargetField()), "目标表不存在映射字段：" + mapping.getTargetField());
             Assert.isTrue(targets.add(mapping.getTargetField()), "系统字段不能重复映射：" + mapping.getTargetField());
         }
@@ -422,7 +426,8 @@ public class PersonGovernanceSyncServiceImpl implements PersonGovernanceSyncServ
     @Aop(TransAop.READ_COMMITTED)
     private void insertPage(PersonApiConfig config, List<PersonApiFieldMapping> mappings, List<NutMap> columns,
                             List<?> rows, PersonSyncBatch batch, String lockKey, String owner,
-                            PersonApiSyncOptions options, Map<String, Set<String>> dictionaryValues, Set<String> unitIds) {
+                            PersonApiSyncOptions options, Map<String, Set<String>> dictionaryValues, Set<String> unitIds,
+                            Map<String, String> fieldDefaults) {
         Assert.isTrue((long) batch.getSourceCount() + rows.size() <= MAX_ROWS, "超过单批最大行数，已终止同步");
         batch.setSourceCount(batch.getSourceCount() + rows.size());
         Map<String, String> types = new HashMap<>();
@@ -462,7 +467,11 @@ public class PersonGovernanceSyncServiceImpl implements PersonGovernanceSyncServ
                 }
                 NutMap values = NutMap.NEW();
                 for (PersonApiFieldMapping mapping : mappings) {
-                    Object value = personApiConfigService.readResponsePath(row, mapping.getSourceField());
+                    Object value = Strings.isBlank(mapping.getSourceField()) ? null
+                            : personApiConfigService.readResponsePath(row, mapping.getSourceField());
+                    if (value == null) {
+                        value = fieldDefaults.get(mapping.getTargetField());
+                    }
                     if (Boolean.TRUE.equals(mapping.getRequired()) && !(preserveUserNulls && value == null)) {
                         Assert.isTrue(value != null && !Strings.isBlank(String.valueOf(value)), "必填来源字段为空：" + mapping.getSourceField());
                     }
diff --git a/src/main/resources/views/platform/personGovernance/apiConfig/form.html b/src/main/resources/views/platform/personGovernance/apiConfig/form.html
index 473265b..f51c15a 100644
--- a/src/main/resources/views/platform/personGovernance/apiConfig/form.html
+++ b/src/main/resources/views/platform/personGovernance/apiConfig/form.html
@@ -448,6 +448,9 @@
             <el-form-item label="长度等于">
                 <el-input v-model="fieldRuleDraft.length" clearable placeholder="留空不过滤，例如 10"></el-input>
             </el-form-item>
+            <el-form-item label="默认值">
+                <el-input v-model="fieldRuleDraft.defaultValue" clearable placeholder="未配置来源或来源值为 null 时使用"></el-input>
+            </el-form-item>
             <el-form-item label="对应字典">
                 <el-select v-model="fieldRuleDraft.dictCode" clearable filterable placeholder="请选择字典分类">
                     <el-option v-for="item in dictChoices" :key="item.code"
@@ -529,7 +532,7 @@
                 dictChoices: [],
                 fieldRuleVisible: false,
                 fieldRuleRow: null,
-                fieldRuleDraft: { length: '', dictCode: '' },
+                fieldRuleDraft: { length: '', dictCode: '', defaultValue: '' },
                 params: [],
                 testCases: [],
                 identityRow: null,
@@ -641,7 +644,7 @@
                 return this.testResults[this.activeEndpoint]
             },
             hasMappedField() {
-                return this.mappings.some((v) => Boolean(v.sourceField && v.targetField))
+                return this.mappings.some((v) => Boolean(v.targetField && (v.sourceField || v.defaultValue)))
             },
         },
         methods: {
@@ -663,6 +666,7 @@
                 this.$set(this, 'fieldRuleDraft', {
                     length: row.filterLength == null ? '' : String(row.filterLength),
                     dictCode: row.dictCode || '',
+                    defaultValue: row.defaultValue || '',
                 })
                 this.$set(this, 'fieldRuleVisible', true)
             },
@@ -670,7 +674,8 @@
                 const row = this.fieldRuleRow
                 const length = this.fieldRuleDraft.length.trim()
                 const dictCode = this.fieldRuleDraft.dictCode
-                if ((length || dictCode) && !(row.sourceField || '').trim()) {
+                const defaultValue = this.fieldRuleDraft.defaultValue
+                if ((length || (dictCode && !defaultValue)) && !(row.sourceField || '').trim()) {
                     this.notifyWarning('请先填写来源字段')
                     return
                 }
@@ -682,8 +687,17 @@
                     this.notifyWarning('选择字典前请填写目标字段')
                     return
                 }
+                if (defaultValue && !row.targetField) {
+                    this.notifyWarning('设置默认值前请选择目标字段')
+                    return
+                }
+                if (defaultValue && (['id', 'pullTime'].includes(row.targetField) || row === this.identityRow)) {
+                    this.notifyWarning('主键、批次时间和唯一标识不能设置默认值')
+                    return
+                }
                 this.$set(row, 'filterLength', length ? Number(length) : null)
                 this.$set(row, 'dictCode', dictCode)
+                this.$set(row, 'defaultValue', defaultValue)
                 this.$set(this, 'fieldRuleVisible', false)
             },
             openQuickMapping() {
@@ -749,6 +763,7 @@
             isIdentityMapping(row) {
                 return Boolean(row && row.sourceField && row.sourceField.trim()
                     && row.targetField && row.targetField.trim()
+                    && !row.defaultValue
                     && row.targetField !== 'pullTime'
                     && (row.targetField !== 'id' || this.form.targetTable === 'sys_unit'))
             },
@@ -930,6 +945,7 @@
                     this.$set(row, 'targetField', '')
                     this.$set(row, 'targetComment', '')
                     this.$set(row, 'identityFlag', false)
+                    this.$set(row, 'defaultValue', '')
                 })
                 this.$set(this, 'identityRow', null)
                 this.$set(this.form, 'enabled', false)
@@ -972,6 +988,7 @@
                                         identityFlag: old ? Boolean(old.identityFlag) : false,
                                         filterLength: old ? old.filterLength : null,
                                         dictCode: old ? old.dictCode : '',
+                                        defaultValue: old ? old.defaultValue : '',
                                     }
                                 })
                                 this.$set(this, 'mappings', rows)
@@ -1138,11 +1155,12 @@
                     const syncOptions = {
                         autoCreateDict: this.syncOptions.autoCreateDict,
                         unitConfigId: !unitTarget && this.autoSyncUnit ? this.syncOptions.unitConfigId : '',
-                        rules: this.mappings.filter((row) => row.filterLength != null || row.dictCode).map((row) => ({
+                        rules: this.mappings.filter((row) => row.filterLength != null || row.dictCode || row.defaultValue).map((row) => ({
                             sourceField: row.sourceField,
                             targetField: row.targetField,
                             length: row.filterLength,
                             dictCode: row.dictCode,
+                            defaultValue: row.defaultValue,
                         })),
                     }
                     this.$set(this, 'formLoading', true)
@@ -1243,11 +1261,12 @@
                             this.$set(this.syncOptions, 'unitConfigId', syncOptions.unitConfigId || '')
                             this.$set(this, 'autoSyncUnit', Boolean(syncOptions.unitConfigId))
                             ;(syncOptions.rules || []).forEach((rule) => {
-                                const row = this.mappings.find((item) => item.sourceField === rule.sourceField
+                                const row = this.mappings.find((item) => (item.sourceField || '') === (rule.sourceField || '')
                                     && (item.targetField || '') === (rule.targetField || ''))
                                 if (row) {
                                     this.$set(row, 'filterLength', rule.length)
                                     this.$set(row, 'dictCode', rule.dictCode || '')
+                                    this.$set(row, 'defaultValue', rule.defaultValue || '')
                                 }
                             })
                             const params = (res.data.params || []).map((v) => {
diff --git a/tools/person-governance-api-mock.js b/tools/person-governance-api-mock.js
index cf815ce..075b76f 100644
--- a/tools/person-governance-api-mock.js
+++ b/tools/person-governance-api-mock.js
@@ -10,14 +10,17 @@
  * Access_Token 路径：data->access_token
  * Expires_in 路径：data->expires_in，单位：SECONDS
  * 数据地址：http://127.0.0.1:18080/api/persons，GET 或 POST
+ * 机构地址：http://127.0.0.1:18080/api/units，GET 或 POST
  * 返回码路径：code，成功返回值：0，消息路径：msg
- * 人员数组路径：data->list，总数路径：data->total
+ * 数据数组路径：data->list，总数路径：data->total
  * 数据字段按人员接口字段表生成，全部为字符串；码值为模拟值。
  * 字段映射示例：gh→loginname、xm→username、xb→sex、sjhm→mobile、yx→email、lxrq→arrivalAtSchoolDate。
  * gh、grbsm 均为唯一标识，可按实际目标中间表字段配置。
+ * 机构配置：dwdm→id（唯一标识）、dwmc→name、bmflmc→unitType。
+ * 人员配置：bmmz→unitId，值与机构接口的 dwdm 相同。
  * 分页 Query 参数：pageNumber=${页码}、pageSize=${数量}，例如起始页码 1、数量 20。
  * POST JSON 也可使用 {"pageNumber":"${页码}","pageSize":"${数量}"}。
- * 不配置分页参数时一次返回全部 100 条数据。
+ * 也支持 page 和 pagesize。不配置分页参数时返回全部 100 条人员或 5 条机构。
  * 默认不要求认证；MOCK_REQUIRE_TOKEN=1 时，数据接口要求以下任意一种凭证：
  * Header Authorization: Bearer ${Access_Token}
  * Query 或 JSON 参数 access_token: ${Access_Token}
@@ -32,12 +35,18 @@ const REQUIRE_TOKEN = process.env.MOCK_REQUIRE_TOKEN === '1';
 const TOKEN = 'person-governance-mock-token';
 const MAX_BODY_BYTES = 1024 * 1024;
 
+const units = [
+    { dwdm: 'MOCK-D1', dwmc: '计算机学院', bmflmc: '教学单位' },
+    { dwdm: 'MOCK-D2', dwmc: '机械工程学院', bmflmc: '教学单位' },
+    { dwdm: 'MOCK-D3', dwmc: '经济管理学院', bmflmc: '教学单位' },
+    { dwdm: 'MOCK-D4', dwmc: '外国语学院', bmflmc: '教学单位' },
+    { dwdm: 'MOCK-D5', dwmc: '教务处', bmflmc: '行政单位' }
+];
+
 const persons = Array.from({ length: 100 }, (_, index) => {
     const number = index + 1;
     const suffix = String(number).padStart(3, '0');
-    const department = index % 5;
-    const departmentCode = `MOCK-D${department + 1}`;
-    const departmentName = ['计算机学院', '机械工程学院', '经济管理学院', '外国语学院', '教务处'][department];
+    const { dwdm: departmentCode, dwmc: departmentName } = units[index % units.length];
     const female = number % 2 === 0;
     const retired = number % 10 === 0;
     const birthYear = retired ? 1960 + index % 5 : 1980 + index % 15;
@@ -175,7 +184,7 @@ function positiveInteger(value, fallback, name) {
 const server = http.createServer(async (request, response) => {
     try {
         const url = new URL(request.url, 'http://localhost');
-        if (!['/api/token', '/api/persons'].includes(url.pathname)) {
+        if (!['/api/token', '/api/persons', '/api/units'].includes(url.pathname)) {
             request.resume();
             return reply(response, 404, 404, '接口不存在');
         }
@@ -196,14 +205,15 @@ const server = http.createServer(async (request, response) => {
             return reply(response, 401, 401, 'Token 无效或未提供');
         }
         const pageNumber = positiveInteger(params.pageNumber ?? params.page, 1, 'pageNumber');
-        const pageSize = positiveInteger(params.pageSize, 100, 'pageSize');
+        const pageSize = positiveInteger(params.pageSize ?? params.pagesize, 100, 'pageSize');
         if (pageSize > 1000) {
             return reply(response, 400, 400, 'pageSize 不能超过 1000');
         }
         const start = (pageNumber - 1) * pageSize;
+        const records = url.pathname === '/api/units' ? units : persons;
         return reply(response, 200, 0, '成功', {
-            list: persons.slice(start, start + pageSize),
-            total: persons.length,
+            list: records.slice(start, start + pageSize),
+            total: records.length,
             pageNumber,
             pageSize
         });
@@ -220,5 +230,5 @@ server.on('error', error => {
 
 server.listen(PORT, HOST, () => {
     console.log(`人员治理测试服务：http://${HOST}:${PORT}，已预填充 ${persons.length} 条模拟数据`);
-    console.log('Token 接口：/api/token；人员接口：/api/persons');
+    console.log('Token 接口：/api/token；人员接口：/api/persons；机构接口：/api/units');
 });