diff --git a/yudao-module-im/src/main/java/cn/iocoder/yudao/module/im/enums/ImContentTypeEnum.java b/yudao-module-im/src/main/java/cn/iocoder/yudao/module/im/enums/ImContentTypeEnum.java
index 4dffd36..2f68ad8 100644
--- a/yudao-module-im/src/main/java/cn/iocoder/yudao/module/im/enums/ImContentTypeEnum.java
+++ b/yudao-module-im/src/main/java/cn/iocoder/yudao/module/im/enums/ImContentTypeEnum.java
@@ -281,9 +281,9 @@ public enum ImContentTypeEnum implements ArrayValuable<Integer> {
     /**
      * 对应 OpenIM：sdkws.GroupMemberInfoSetTips（GroupMemberInfoSetNotification 1516，窄化到 displayUserName）
      * 对应自己的类：GroupMemberNicknameUpdateNotification
-     * 场景：成员修改自己在群里的昵称，全员广播；前端按 displayUserName 局部更新对应 member
+     * 场景：成员修改自己在群里的昵称，在线成员同步对应 member
      */
-    GROUP_MEMBER_NICKNAME_UPDATE(1516, "成员昵称变更", true, false),
+    GROUP_MEMBER_NICKNAME_UPDATE(1516, "成员昵称变更", false, false),
     /**
      * 对应 OpenIM：GroupMemberSetToAdminNotification 1517
      * 对应自己的类：GroupAdminAddNotification
diff --git a/yudao-module-im/src/main/java/cn/iocoder/yudao/module/im/service/group/ImGroupMemberServiceImpl.java b/yudao-module-im/src/main/java/cn/iocoder/yudao/module/im/service/group/ImGroupMemberServiceImpl.java
index c0def09..c712a0b 100644
--- a/yudao-module-im/src/main/java/cn/iocoder/yudao/module/im/service/group/ImGroupMemberServiceImpl.java
+++ b/yudao-module-im/src/main/java/cn/iocoder/yudao/module/im/service/group/ImGroupMemberServiceImpl.java
@@ -258,7 +258,7 @@ public class ImGroupMemberServiceImpl implements ImGroupMemberService {
                 .setId(member.getId());
         groupMemberMapper.updateById(updateObj);
 
-        // 3.1 displayUserName 是公开字段，单独走 GROUP_MEMBER_NICKNAME_UPDATE 广播给全员；空串视为「清空昵称」也要广播；与旧值相同跳过
+        // 3.1 displayUserName 是公开字段，单独走 GROUP_MEMBER_NICKNAME_UPDATE 在线同步给全员；空串视为「清空昵称」也要同步；与旧值相同跳过
         if (updateReqVO.getDisplayUserName() != null
                 && ObjUtil.notEqual(updateReqVO.getDisplayUserName(), member.getDisplayUserName())) {
             groupMessageService.sendGroupMessage(userId, ImGroupMessageSendDTO.ofGroupMemberNicknameUpdate(
diff --git a/yudao-module-im/src/test/java/cn/iocoder/yudao/module/im/service/group/ImGroupMemberServiceImplTest.java b/yudao-module-im/src/test/java/cn/iocoder/yudao/module/im/service/group/ImGroupMemberServiceImplTest.java
index 5557c9b..ba4e0a8 100644
--- a/yudao-module-im/src/test/java/cn/iocoder/yudao/module/im/service/group/ImGroupMemberServiceImplTest.java
+++ b/yudao-module-im/src/test/java/cn/iocoder/yudao/module/im/service/group/ImGroupMemberServiceImplTest.java
@@ -242,7 +242,7 @@ public class ImGroupMemberServiceImplTest extends BaseMockitoUnitTest {
         verify(groupMemberMapper).updateById(captor.capture());
         assertEquals(50L, captor.getValue().getId());
         assertTrue(captor.getValue().getSilent());
-        // 公开字段昵称变化 → 全员广播 GROUP_MEMBER_NICKNAME_UPDATE
+        // 公开字段昵称变化 → 全员在线同步 GROUP_MEMBER_NICKNAME_UPDATE
         verify(groupMessageService).sendGroupMessage(eq(1L), any(cn.iocoder.yudao.module.im.service.message.dto.ImGroupMessageSendDTO.class));
         // 个人字段 silent 变化 → 仅自己多端同步 GROUP_MEMBER_SETTING_UPDATE
         verify(groupMessageService).sendGroupMessage(eq(1L), eq(ListUtil.of(1L)),
diff --git a/yudao-module-im/src/test/java/cn/iocoder/yudao/module/im/service/message/ImGroupMessageServiceImplTest.java b/yudao-module-im/src/test/java/cn/iocoder/yudao/module/im/service/message/ImGroupMessageServiceImplTest.java
index 3192775..3fdf672 100644
--- a/yudao-module-im/src/test/java/cn/iocoder/yudao/module/im/service/message/ImGroupMessageServiceImplTest.java
+++ b/yudao-module-im/src/test/java/cn/iocoder/yudao/module/im/service/message/ImGroupMessageServiceImplTest.java
@@ -961,6 +961,20 @@ public class ImGroupMessageServiceImplTest extends BaseMockitoUnitTest {
     }
 
     @Test
+    public void testSendGroupMessage_dto_groupMemberNicknameUpdateNotInserted() {
+        // 准备：成员昵称变更只做在线同步，不入库
+        ImGroupMessageSendDTO dto = ImGroupMessageSendDTO.ofGroupMemberNicknameUpdate(10L, 1L, "群昵称");
+        when(groupMemberService.getActiveGroupMemberUserIdsByGroupId(10L)).thenReturn(List.of(1L, 2L));
+
+        groupMessageService.sendGroupMessage(1L, dto);
+
+        verify(groupMessageMapper, never()).insert(any(ImGroupMessageDO.class));
+        verify(imWebSocketService).sendNotificationAsync(argThat((Collection<Long> ids) ->
+                        ids.size() == 2 && ids.contains(1L) && ids.contains(2L)),
+                anyInt(), eq(ImContentTypeEnum.GROUP_MEMBER_NICKNAME_UPDATE.getType()), any());
+    }
+
+    @Test
     public void testSendGroupMessage_threeArg_explicitTargetsBypassActiveMembers() {
         // 准备：调用方传入显式 targets（解散场景成员已被批量 DISABLE，必须按移除前快照推送）
         Set<Long> targets = Set.of(1L, 2L, 3L);