diff --git a/web/backend/services/huya_runner_core.py b/web/backend/services/huya_runner_core.py
index 86f072d..57ed5ed 100644
--- a/web/backend/services/huya_runner_core.py
+++ b/web/backend/services/huya_runner_core.py
@@ -46,7 +46,7 @@ class HuyaBatchRunnerCore:
         self._stop = threading.Event()
         self._counter_lock = threading.Lock()
         self._started = 0
-        self._wss_sessions: list[Any] = []
+        self._wss_sessions = threading.local()
 
     def stop(self):
         self._stop.set()
@@ -61,9 +61,16 @@ class HuyaBatchRunnerCore:
             kind=kind,
             logger=lambda message: self._push_log("info", f"[{uid}] {message}"),
         )
-        self._wss_sessions.append(session)
+        self._session_bucket().append(session)
         return session
 
+    def _session_bucket(self) -> list[Any]:
+        bucket = getattr(self._wss_sessions, "items", None)
+        if bucket is None:
+            bucket = []
+            self._wss_sessions.items = bucket
+        return bucket
+
     def _activity_client(self, uid: int, cookie: str):
         """活动任务优先使用最新活动 WSS，建连失败才回退 HTTP。"""
         from core.huya.http_client import HuyaHttpClient
@@ -79,12 +86,13 @@ class HuyaBatchRunnerCore:
             return HuyaHttpClient(logger=lambda msg: self._push_log("info", f"[{uid}] {msg}"))
 
     def _close_wss_sessions(self):
-        for session in reversed(self._wss_sessions):
+        bucket = self._session_bucket()
+        for session in reversed(bucket):
             try:
                 session.close()
             except Exception:  # noqa: BLE001 - cleanup must not mask task status
                 logger.debug("[huya] WSS 会话清理异常")
-        self._wss_sessions.clear()
+        bucket.clear()
 
     def _push_log(self, level: str, message: str):
         if level == "result":