diff --git a/src/main/java/com/project/task/domain/service/impl/SaveOrUpdateTaskDomainServiceImpl.java b/src/main/java/com/project/task/domain/service/impl/SaveOrUpdateTaskDomainServiceImpl.java
index fc0abdc..15a34fb 100644
--- a/src/main/java/com/project/task/domain/service/impl/SaveOrUpdateTaskDomainServiceImpl.java
+++ b/src/main/java/com/project/task/domain/service/impl/SaveOrUpdateTaskDomainServiceImpl.java
@@ -105,9 +105,12 @@ public class SaveOrUpdateTaskDomainServiceImpl implements SaveOrUpdateTaskDomain
         taskUserBaseService.remove(new LambdaQueryWrapper<TaskUserEntity>()
                 .eq(TaskUserEntity::getTaskId , saveEntity.getId()));
 
+        //过滤重复userID
+        List<String> participantUserIdList = dto.getParticipantUserIdList().stream().distinct().collect(Collectors.toList());
+
         List<TaskUserEntity> taskUserEntityList = new ArrayList<>();
         Map<String, String> userMap = userBaseService.lambdaQuery().select(UserEntity::getId, UserEntity::getName)
-                .in(UserEntity::getId, dto.getParticipantUserIdList()).list()
+                .in(UserEntity::getId, participantUserIdList).list()
                 .stream()
                 .collect(Collectors.toMap(UserEntity::getId, UserEntity::getName));