diff --git a/utils/wechat/member_monitor.py b/utils/wechat/member_monitor.py
index 2c083cb..c6764c0 100644
--- a/utils/wechat/member_monitor.py
+++ b/utils/wechat/member_monitor.py
@@ -52,16 +52,17 @@ class ChatroomMemberMonitor:
                 removed_wxids = [m['wxid'] for m in changes['removed']]
                 self._remove_members_from_db(group_id, removed_wxids)
             
-            # 5.2 保存新增的成员
+            # 5.2 保存新增的成员（使用原始API数据以正确映射字段）
             if changes['added']:
-                self.db.save_chatroom_member_simple(group_id, changes['added'])
+                added_raw = [m.get('raw_data', m) for m in changes['added']]
+                self.db.save_chatroom_member_simple(group_id, added_raw)
                 self.logger.info(f"群 {group_id} 新增 {len(changes['added'])} 名成员缓存")
 
-            # 5.3 更新修改的成员
+            # 5.3 更新修改的成员（同样使用原始API数据）
             if changes['modified']:
-                modified_members = [m['member'] for m in changes['modified']]
-                self.db.save_chatroom_member_simple(group_id, modified_members)
-                self.logger.info(f"群 {group_id} 更新 {len(modified_members)} 名成员缓存")
+                modified_raw = [m['member'].get('raw_data', m['member']) for m in changes['modified']]
+                self.db.save_chatroom_member_simple(group_id, modified_raw)
+                self.logger.info(f"群 {group_id} 更新 {len(modified_raw)} 名成员缓存")
                 
         else:
             self.logger.info(f"群 {group_id} 成员无变化")