diff --git a/nanobot/channels/qq.py b/nanobot/channels/qq.py
index 7b171bc..6c58049 100644
--- a/nanobot/channels/qq.py
+++ b/nanobot/channels/qq.py
@@ -56,6 +56,7 @@ class QQChannel(BaseChannel):
         self.config: QQConfig = config
         self._client: "botpy.Client | None" = None
         self._processed_ids: deque = deque(maxlen=1000)
+        self._msg_seq: int = 1  # 消息序列号，避免被 QQ API 去重
 
     async def start(self) -> None:
         """Start the QQ bot."""
@@ -102,11 +103,13 @@ class QQChannel(BaseChannel):
             return
         try:
             msg_id = msg.metadata.get("message_id")
+            self._msg_seq += 1  # 递增序列号
             await self._client.api.post_c2c_message(
                 openid=msg.chat_id,
                 msg_type=0,
                 content=msg.content,
                 msg_id=msg_id,
+                msg_seq=self._msg_seq,  # 添加序列号避免去重
             )
         except Exception as e:
             logger.error("Error sending QQ message: {}", e)
@@ -133,3 +136,4 @@ class QQChannel(BaseChannel):
             )
         except Exception:
             logger.exception("Error handling QQ message")
+