diff --git a/pcm-influxdb-debug.py b/pcm-influxdb-debug.py
index 434f04a..83514ee 100644
--- a/pcm-influxdb-debug.py
+++ b/pcm-influxdb-debug.py
@@ -1712,6 +1712,83 @@ class ModbusGateway:
         self.config_service.start()
         self.logger.info(f"Config service started on {config_service_host}:{config_service_port}")
 
+        # 任务状态持久化文件路径（独立文件，不会被外部覆盖）
+        self.task_state_file = '.task_state.json'
+
+    def _load_task_running_time(self) -> float:
+        """
+        从独立的持久化文件加载任务累计运行时间
+        
+        Returns:
+            float: 累计运行时间（秒），文件不存在时返回0
+        """
+        try:
+            if not os.path.exists(self.task_state_file):
+                self.logger.info(f"Task state file not found: {self.task_state_file}, starting from 0")
+                return 0
+            
+            with open(self.task_state_file, 'r', encoding='utf-8') as f:
+                data = json.load(f)
+            
+            running_time = data.get('running_time', 0)
+            if running_time > 0:
+                self.logger.info(f"Loaded task running_time from {self.task_state_file}: {running_time:.2f}s")
+            return float(running_time)
+            
+        except json.JSONDecodeError as e:
+            self.logger.error(f"Task state file corrupted: {e}, starting from 0")
+            return 0
+        except Exception as e:
+            self.logger.error(f"Error loading task running_time: {e}, starting from 0")
+            return 0
+
+    def _save_task_running_time(self, running_time: float) -> bool:
+        """
+        保存任务累计运行时间到独立的持久化文件（原子写入）
+        
+        Args:
+            running_time: 累计运行时间（秒）
+            
+        Returns:
+            bool: 保存成功返回 True，失败返回 False
+        """
+        try:
+            data = {
+                'running_time': running_time,
+                'last_update': datetime.now().isoformat(),
+                'version': '1.0'
+            }
+            
+            # 原子写入：先写临时文件，再重命名
+            temp_file = self.task_state_file + '.tmp'
+            with open(temp_file, 'w', encoding='utf-8') as f:
+                json.dump(data, f, indent=2, ensure_ascii=False)
+            
+            # 重命名（原子操作）
+            os.replace(temp_file, self.task_state_file)
+            return True
+            
+        except Exception as e:
+            self.logger.error(f"Error saving task running_time: {e}")
+            # 清理临时文件
+            try:
+                temp_file = self.task_state_file + '.tmp'
+                if os.path.exists(temp_file):
+                    os.remove(temp_file)
+            except:
+                pass
+            return False
+
+    def _reset_task_running_time(self) -> bool:
+        """
+        重置任务累计运行时间为0
+        
+        Returns:
+            bool: 重置成功返回 True，失败返回 False
+        """
+        self.logger.info("Resetting task running_time to 0")
+        return self._save_task_running_time(0)
+
     def _update_modbus_datas(self):
         """更新本地Modbus服务器的寄存器"""
         if not hasattr(self, 'context'):
@@ -1897,7 +1974,20 @@ class ModbusGateway:
         task_control_reg_addr = self.config_manager.config['task']['control_reg_addr']
         task_control_reg_value = 0x0000
         self.taskInfo['start_time'] = None
-        self.taskInfo['running_time'] = 0
+        
+        # 从配置文件恢复运行时间（如果有）
+        saved_running_time = self._load_task_running_time()
+        if saved_running_time > 0:
+            self.taskInfo['running_time'] = saved_running_time
+            self.logger.info(f"Restored running_time from config: {self.taskInfo['running_time']:.2f}s")
+        else:
+            self.taskInfo['running_time'] = 0
+        
+        # 持久化保存相关变量
+        last_save_time = time.time()
+        SAVE_INTERVAL = 5  # 每5秒保存一次
+        last_running_time = self.taskInfo['running_time']  # 用于检测变化
+        
         while True:
             self.gps.config = self.config_manager.config['gps']
             self.lsdaq.config = self.config_manager.config['lsdaq']
@@ -1908,6 +1998,9 @@ class ModbusGateway:
             match self.taskInfo['status']:
                 case 0x0000:
                     self.breaker.openBreaker()
+                    # 实验停止时重置运行时间
+                    if self.taskInfo['running_time'] > 0:
+                        self._reset_task_running_time()
                     self.taskInfo['start_time'] = None
                     self.taskInfo['running_time'] = 0
                 case 0x5555:
@@ -1920,6 +2013,8 @@ class ModbusGateway:
                         self.taskInfo['start_time'] = time.time()
 
                     if self.taskInfo['running_time'] > self.taskInfo['period']:
+                        # 实验完成时重置运行时间
+                        self._reset_task_running_time()
                         self.holding_registers.values[task_control_reg_addr+1] = 0xFFFF
                         continue
 
@@ -1945,6 +2040,14 @@ class ModbusGateway:
                 # self._read_plc_datas()
             self._update_modbus_datas()
 
+            # 周期性保存运行时间（仅在运行状态且时间有变化时保存）
+            if self.taskInfo['status'] == 0x5555:
+                if (nowtime - last_save_time) >= SAVE_INTERVAL:
+                    if self.taskInfo['running_time'] != last_running_time:
+                        self._save_task_running_time(self.taskInfo['running_time'])
+                        last_running_time = self.taskInfo['running_time']
+                    last_save_time = nowtime
+
             # 控制寄存器