diff --git a/src/main/java/io/v/nutz/trainSignUp/controller/mobile/MTrainSignUpActivityController.java b/src/main/java/io/v/nutz/trainSignUp/controller/mobile/MTrainSignUpActivityController.java
index 666c2b5..386b652 100644
--- a/src/main/java/io/v/nutz/trainSignUp/controller/mobile/MTrainSignUpActivityController.java
+++ b/src/main/java/io/v/nutz/trainSignUp/controller/mobile/MTrainSignUpActivityController.java
@@ -94,7 +94,7 @@ public class MTrainSignUpActivityController {
     @Ok("json:full")
     @POST
     @ViReturn
-    public Object doSignUp(TrainSignUpUser trainSignUpUser) {
+    public synchronized Object doSignUp(TrainSignUpUser trainSignUpUser) {
         try {
             lock.lock();
             trainSignUpActivityService.doSignUp(trainSignUpUser);
@@ -178,7 +178,7 @@ public class MTrainSignUpActivityController {
     @POST
     @ViReturn
     @RequiresAuthentication
-    public Object validateSignUp(String courseId,
+    public synchronized Object validateSignUp(String courseId,
                                  @Param(value = "cndId") String cndId) {
         try {
             lock.lock();
diff --git a/src/main/java/io/v/nutz/trainSignUp/service/impl/TrainSignUpActivityServiceImpl.java b/src/main/java/io/v/nutz/trainSignUp/service/impl/TrainSignUpActivityServiceImpl.java
index a395143..93a8af6 100644
--- a/src/main/java/io/v/nutz/trainSignUp/service/impl/TrainSignUpActivityServiceImpl.java
+++ b/src/main/java/io/v/nutz/trainSignUp/service/impl/TrainSignUpActivityServiceImpl.java
@@ -376,7 +376,7 @@ public class TrainSignUpActivityServiceImpl extends ViServiceImpl<TrainSignUpAct
     }
 
     @Override
-    public boolean isSignFull(String courseId) {
+    public synchronized boolean isSignFull(String courseId) {
         //课程限制人数
         TrainSignUpCourse course = dao().fetch(TrainSignUpCourse.class, courseId);
         int coursePeopleNumber = course.getCoursePeopleNumber();