diff --git a/laws-modules/src/main/java/com/jero/modules/activiti/service/ProcessAllService.java b/laws-modules/src/main/java/com/jero/modules/activiti/service/ProcessAllService.java
index 903a69f5..eef68d32 100644
--- a/laws-modules/src/main/java/com/jero/modules/activiti/service/ProcessAllService.java
+++ b/laws-modules/src/main/java/com/jero/modules/activiti/service/ProcessAllService.java
@@ -298,7 +298,7 @@ public class ProcessAllService extends ServiceImpl<ProcessAllMapper, ProcessAll>
 
     }
     @Transactional(rollbackFor = JeroBootException.class)
-    public void delegateTask(DelegateTaskParam param) {
+    public synchronized void delegateTask(DelegateTaskParam param) {
         String taskId = param.getTaskId();
         String userId = param.getUserId();
         Integer prcType = param.getPrcType();
@@ -326,6 +326,17 @@ public class ProcessAllService extends ServiceImpl<ProcessAllMapper, ProcessAll>
         if(Objects.isNull(processNode)){
             throw new JeroBootException("数据不存在");
         }
+        // 不可重复加签
+        LambdaQueryWrapper<ProcessNodeLink> queryProcessNodeLink = new LambdaQueryWrapper<>();
+        queryProcessNodeLink.eq(ProcessNodeLink::getProcessDefinitionId,processDefinitionId);
+        queryProcessNodeLink.eq(ProcessNodeLink::getProcessNodeId,processNode.getId());
+        queryProcessNodeLink.eq(ProcessNodeLink::getProcessDefinitionId, processDefinitionId);
+        queryProcessNodeLink.eq(ProcessNodeLink::getUserId,userId);
+        long l = processNodeLinkService.count(queryProcessNodeLink);
+        if(l > 0){
+            throw new JeroBootException("加签人员重复");
+        }
+
         processNodeLink.setProcessNodeId(processNode.getId());
         processNodeLink.setUserId(userId);
         processNodeLinkService.save(processNodeLink);