diff --git a/astrbot/core/platform/sources/wechatpadpro/wechatpadpro_adapter.py b/astrbot/core/platform/sources/wechatpadpro/wechatpadpro_adapter.py
index 7746ba889..58e3c9b19 100644
--- a/astrbot/core/platform/sources/wechatpadpro/wechatpadpro_adapter.py
+++ b/astrbot/core/platform/sources/wechatpadpro/wechatpadpro_adapter.py
@@ -505,7 +505,7 @@ class WeChatPadProAdapter(Platform):
 
             # 对于群聊，session_id 可以是群聊 ID 或发送者 ID + 群聊 ID (如果 unique_session 为 True)
             if self.unique_session:
-                abm.session_id = f"{from_user_name}_{abm.sender.user_id}"
+                abm.session_id = f"{from_user_name}#{abm.sender.user_id}"
             else:
                 abm.session_id = from_user_name
 
@@ -832,7 +832,10 @@ class WeChatPadProAdapter(Platform):
         # 根据 session_id 判断消息类型
         if "@chatroom" in session.session_id:
             dummy_message_obj.type = MessageType.GROUP_MESSAGE
-            dummy_message_obj.group_id = session.session_id
+            if "#" in session.session_id:
+                dummy_message_obj.group_id = session.session_id.split("#")[0]
+            else:
+                dummy_message_obj.group_id = session.session_id
             dummy_message_obj.sender = MessageMember(user_id="", nickname="")
         else:
             dummy_message_obj.type = MessageType.FRIEND_MESSAGE
diff --git a/astrbot/core/platform/sources/wechatpadpro/wechatpadpro_message_event.py b/astrbot/core/platform/sources/wechatpadpro/wechatpadpro_message_event.py
index ab836ad28..3bb753dd4 100644
--- a/astrbot/core/platform/sources/wechatpadpro/wechatpadpro_message_event.py
+++ b/astrbot/core/platform/sources/wechatpadpro/wechatpadpro_message_event.py
@@ -81,12 +81,16 @@ class WeChatPadProMessageEvent(AstrMessageEvent):
             # logger.info(f"已添加 @ 信息: {message_text}")
         else:
             message_text = text
+        if self.get_group_id() and "#" in self.session_id:
+            session_id = self.session_id.split("#")[0]
+        else:
+            session_id = self.session_id
         payload = {
             "MsgItem": [
                 {
                     "MsgType": 1,
                     "TextContent": message_text,
-                    "ToUserName": self.session_id,
+                    "ToUserName": session_id,
                 }
             ]
         }