diff --git a/algorithms.py b/algorithms.py
index 1bf5af1..9846fe3 100644
--- a/algorithms.py
+++ b/algorithms.py
@@ -908,22 +908,111 @@ class AlgorithmManager:
             logger.error(f"重新加载ROI算法配置失败: {e}")
             return False
     
-    def reload_all_algorithms(self) -> int:
-        """重新加载所有算法配置"""
+    def update_algorithm_params(self, roi_id: str, bind_id: str, bind_config: dict) -> bool:
+        """仅更新算法参数，保留状态机
+
+        Args:
+            roi_id: ROI ID
+            bind_id: 绑定ID
+            bind_config: 绑定配置字典（包含algo_code和params）
+
+        Returns:
+            是否成功更新
+        """
+        try:
+            import json
+            key = f"{roi_id}_{bind_id}"
+
+            # 算法实例不存在，创建新的
+            if roi_id not in self.algorithms or key not in self.algorithms[roi_id]:
+                return self.load_bind_from_redis(bind_id)
+
+            # 提取参数
+            params_str = bind_config.get("params", "{}")
+            params = json.loads(params_str) if isinstance(params_str, str) else params_str
+            algo_code = bind_config.get("algo_code")
+
+            # 获取现有算法实例
+            existing_algo = self.algorithms[roi_id][key].get(algo_code)
+
+            if existing_algo is None:
+                # 算法类型不匹配，重新创建
+                return self.load_bind_from_redis(bind_id)
+
+            # 更新参数（根据算法类型调用不同的更新方法）
+            if algo_code == "leave_post":
+                # 更新离岗检测参数
+                leave_countdown_sec = params.get("leave_countdown_sec", 300)
+                working_hours = params.get("working_hours", [])
+                confirm_on_duty_sec = params.get("confirm_on_duty_sec", 10)
+                confirm_leave_sec = params.get("confirm_leave_sec", 30)
+                cooldown_sec = params.get("cooldown_sec", 600)
+                target_class = params.get("target_class", "person")
+
+                existing_algo.leave_countdown_sec = leave_countdown_sec
+                existing_algo.working_hours = working_hours
+                existing_algo.confirm_on_duty_sec = confirm_on_duty_sec
+                existing_algo.confirm_leave_sec = confirm_leave_sec
+                existing_algo.cooldown_sec = cooldown_sec
+                existing_algo.target_class = target_class
+
+                logger.info(f"[{roi_id}_{bind_id}] 更新离岗检测参数: countdown={leave_countdown_sec}s, hours={len(working_hours)}")
+
+            elif algo_code == "intrusion":
+                # 更新周界入侵参数
+                confirm_intrusion_sec = params.get("confirm_intrusion_seconds") or params.get("confirm_seconds", 5)
+                confirm_clear_sec = params.get("confirm_clear_seconds", 180)
+                cooldown_sec = params.get("cooldown_seconds", 300)
+                target_class = params.get("target_class")
+
+                existing_algo.confirm_intrusion_seconds = confirm_intrusion_sec
+                existing_algo.confirm_clear_seconds = confirm_clear_sec
+                existing_algo.cooldown_seconds = cooldown_sec
+                if target_class is not None:
+                    existing_algo.target_class = target_class
+
+                logger.info(f"[{roi_id}_{bind_id}] 更新周界入侵参数: intrusion={confirm_intrusion_sec}s, clear={confirm_clear_sec}s")
+
+            # 其他算法类型可以在此添加
+
+            return True
+
+        except Exception as e:
+            logger.error(f"更新算法参数失败 {roi_id}_{bind_id}: {e}")
+            return False
+
+    def reload_all_algorithms(self, preserve_state: bool = True) -> int:
+        """重新加载所有算法配置
+
+        Args:
+            preserve_state: 是否保留算法状态（默认True）
+                          True - 仅更新参数，保留状态机（用于配置更新）
+                          False - 完全重置（用于手动重启）
+
+        Returns:
+            成功加载的算法数量
+        """
         count = 0
         try:
             from core.config_sync import get_config_sync_manager
             config_manager = get_config_sync_manager()
             bindings = config_manager.get_bindings_from_redis("")
-            
+
             for bind in bindings:
                 bind_id = bind.get("bind_id")
                 roi_id = bind.get("roi_id")
-                self.reset_algorithm(roi_id, bind_id)
-                if self.load_bind_from_redis(bind_id):
-                    count += 1
-            
-            logger.info(f"已重新加载 {count} 个算法配置")
+
+                if preserve_state:
+                    # 仅更新参数，不重置状态
+                    if self.update_algorithm_params(roi_id, bind_id, bind):
+                        count += 1
+                else:
+                    # 完全重置
+                    self.reset_algorithm(roi_id, bind_id)
+                    if self.load_bind_from_redis(bind_id):
+                        count += 1
+
+            logger.info(f"已重新加载 {count} 个算法配置 (preserve_state={preserve_state})")
             return count
         except Exception as e:
             logger.error(f"重新加载所有算法配置失败: {e}")
diff --git a/main.py b/main.py
index 199f907..5047693 100644
--- a/main.py
+++ b/main.py
@@ -97,7 +97,8 @@ class EdgeInferenceService:
             if self._settings.config_sync_mode == "LOCAL" and self._config_manager:
                 def _on_config_update(topic, data):
                     if self._algorithm_manager:
-                        self._algorithm_manager.reload_all_algorithms()
+                        # 保留状态地更新参数，避免告警重复
+                        self._algorithm_manager.reload_all_algorithms(preserve_state=True)
                     # 配置更新后清理无ROI的摄像头流
                     self._cleanup_cameras_without_roi()
                     # 配置更新后动态加载新摄像头流（异步执行，不阻塞HTTP响应）