diff --git a/db/contacts_db.py b/db/contacts_db.py
index 50b3447..216cdc6 100644
--- a/db/contacts_db.py
+++ b/db/contacts_db.py
@@ -574,6 +574,17 @@ class ContactsDBOperator(BaseDBOperator):
             self.LOG.error(f"删除群聊{chatroom_id}信息失败: {e}")
             return False
 
+    def delete_chatroom_members_info(self, chatroom_id: str) -> bool:
+        """删除群成员信息"""
+        try:
+            sql = "DELETE FROM t_chatroom_member WHERE chatroom_id = %s"
+            self.execute_update(sql, (chatroom_id,))
+            self.LOG.info(f"成功删除群聊 {chatroom_id} 的成员信息")
+            return True
+        except Exception as e:
+            self.LOG.error(f"删除群聊{chatroom_id}的成员信息失败: {e}")
+            return False
+
     # 新增获取群列表接口
     def get_chatroom_list(self) -> List[dict]:
         """获取群列表"""
diff --git a/robot.py b/robot.py
index 312fdac..71bdda5 100644
--- a/robot.py
+++ b/robot.py
@@ -587,6 +587,8 @@ class Robot:
                 members = await self.ipad_bot.get_chatroom_member_list(group_id)
                 # 保存群成员信息
                 if members:
+                    # 清除所有的成员信息， 重新写入。
+                    self.contacts_db.delete_chatroom_members_info(group_id)
                     # 兼容逻辑已放到save_chatroom_member_simple内部
                     self.contacts_db.save_chatroom_member_simple(group_id, members)
                     self.LOG.info(f"member_list: {members}")