diff --git a/base/plugin_common/plugin_manager.py b/base/plugin_common/plugin_manager.py
index d614b1d..aba06d7 100644
--- a/base/plugin_common/plugin_manager.py
+++ b/base/plugin_common/plugin_manager.py
@@ -61,7 +61,8 @@ class PluginManager:
         # 热加载相关
         self._watcher_thread: Optional[threading.Thread] = None
         self._watcher_stop_event = threading.Event()
-        self._watcher_interval = 2.0
+        # 默认每 60 秒扫描一次插件目录，降低线上资源消耗
+        self._watcher_interval = 60.0
         self._module_file_state: Dict[str, Dict[str, float]] = {}
         self._watcher_lock = threading.RLock()
 
@@ -132,9 +133,12 @@ class PluginManager:
             except Exception as e:
                 self.LOG.error(f"自动注入 bot 到插件 {plugin.name} 失败: {e}")
 
-    def start_hot_reload_watcher(self, interval_seconds: float = 2.0):
+    def start_hot_reload_watcher(self, interval_seconds: float = 60.0):
         """
         启动插件目录变更监听线程（轮询）
+
+        Args:
+            interval_seconds: 轮询间隔秒数，默认 60 秒
         """
         with self._watcher_lock:
             if self._watcher_thread and self._watcher_thread.is_alive():
diff --git a/robot.py b/robot.py
index 807ced1..1d71191 100644
--- a/robot.py
+++ b/robot.py
@@ -98,7 +98,8 @@ class Robot:
         self.plugin_manager = PluginManager(plugin_dir=getattr(self.config, "plugin_dir", "plugins"))
         self.plugin_manager.set_system_context(self.system_context)
         self.plugins = self.plugin_manager.load_all_plugins()
-        self.plugin_manager.start_hot_reload_watcher(interval_seconds=2.0)
+        # 热加载改为低频扫描：每 60 秒检查一次插件文件变动
+        self.plugin_manager.start_hot_reload_watcher(interval_seconds=60.0)
 
         # 加载插件
         self.LOG.debug("插件系统初始化完成")