diff --git a/README.md b/README.md
index 32c8461..b103c83 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+# 0.0.4
+- 超时守护
 # 0.0.3
 - 修复bug
 # 0.0.2
diff --git a/spider/main.py b/spider/main.py
index 8050ad3..23c7460 100644
--- a/spider/main.py
+++ b/spider/main.py
@@ -491,21 +491,42 @@ def close_and_delete_browser(browser_id: str) -> None:
     except Exception as e:
         logger.warning(f"删除浏览器失败或已删除: {browser_id} - {e}")
 
+def timeout_guard(browser_id: str, done_event: threading.Event, timeout_sec: float = 300.0) -> None:
+    """
+    任务超时守护：超过指定时间未完成则关闭并删除对应指纹浏览器
+
+    参数:
+        browser_id: 指纹浏览器ID
+        done_event: 任务完成事件，完成则终止守护
+        timeout_sec: 超时时长（秒），默认 300 秒
+    """
+    finished = done_event.wait(timeout=timeout_sec)
+    if finished:
+        return
+    logger.warning(f"任务超过 {timeout_sec} 秒未完成，开始清理浏览器: {browser_id}")
+    try:
+        close_and_delete_browser(browser_id)
+    except Exception as e:
+        logger.warning(f"超时清理浏览器失败: {browser_id} - {e}")
 
 def run_task_with_proxy(proxy: str, stop_event: threading.Event) -> None:
     """
-    使用代理创建指纹浏览器、执行自动化，并在结束后清理
+    使用代理创建指纹浏览器、执行自动化，并在结束后清理；内置 5 分钟超时守护
 
     参数:
         proxy: 代理字符串
     """
     browser_id: str | None = None
+    done_event = threading.Event()
     try:
         created = create_fingerprint_browser(proxy)
         if not created:
             return
         browser_id, http = created
         logger.info(f"browser_id: {browser_id} http: {http}")
+        # 启动超时守护线程（5分钟）
+        guard = threading.Thread(target=timeout_guard, args=(browser_id, done_event, 300.0), daemon=True)
+        guard.start()
         if stop_event.is_set():
             return
         auto = Auto(http=http)
@@ -520,6 +541,11 @@ def run_task_with_proxy(proxy: str, stop_event: threading.Event) -> None:
     except Exception as e:
         logger.error(f"执行任务异常: {e}")
     finally:
+        # 标记任务已完成，终止守护线程
+        try:
+            done_event.set()
+        except Exception:
+            pass
         if browser_id:
             try:
                 close_and_delete_browser(browser_id)