diff --git a/backend/src/main/java/com/budwk/app/client/module/activity/service/impl/ClientActivityServiceImpl.java b/backend/src/main/java/com/budwk/app/client/module/activity/service/impl/ClientActivityServiceImpl.java
index 2443605..8e8dbc5 100644
--- a/backend/src/main/java/com/budwk/app/client/module/activity/service/impl/ClientActivityServiceImpl.java
+++ b/backend/src/main/java/com/budwk/app/client/module/activity/service/impl/ClientActivityServiceImpl.java
@@ -21,6 +21,7 @@ import org.nutz.lang.util.NutMap;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.util.List;
+import java.util.stream.Collectors;
 
 @IocBean(args = {"refer:dao"})
 public class ClientActivityServiceImpl extends BaseServiceImpl<Activity> implements ClientActivityService {
@@ -46,12 +47,33 @@ public class ClientActivityServiceImpl extends BaseServiceImpl<Activity> impleme
 
     @Override
     public void signUp(ClientActivitySignVO signVO) {
+        List<ActUser> userList = signVO.getUserList();
+
+        // 检查是否有重复的身份证号
+        boolean hasDuplicateIdCard = userList.stream()
+                .collect(Collectors.groupingBy(ActUser::getIdCard, Collectors.counting()))
+                .values().stream()
+                .anyMatch(count -> count > 1);
+
+        // 检查是否有重复的手机号
+        boolean hasDuplicatePhone = userList.stream()
+                .collect(Collectors.groupingBy(ActUser::getPhone, Collectors.counting()))
+                .values().stream()
+                .anyMatch(count -> count > 1);
+
+        if(hasDuplicateIdCard){
+            throw new BaseException("身份证号重复");
+        }
+
+        if(hasDuplicatePhone){
+            throw new BaseException("手机号重复");
+        }
+
         LocalDateTime now = LocalDateTime.now();
 
         Client_user selfUser = dao().fetch(Client_user.class, StpClientUtil.STP.getLoginIdAsLong());
         dao().fetchLinks(selfUser, "unit");
 
-        List<ActUser> userList = signVO.getUserList();
         // 首先检查报名人员是否已经在用户表中
         for (ActUser user : userList) {
             Client_user clientUser = dao().fetch(Client_user.class, Cnd.where(Client_user::getIdCard, "=", user.getIdCard()).or(Client_user::getPhone, "=", user.getPhone()));