diff --git a/viewshanghai-module-iot/viewshanghai-module-iot-biz/src/main/java/com/viewshanghai/module/iot/service/device/message/IotDeviceMessageServiceImpl.java b/viewshanghai-module-iot/viewshanghai-module-iot-biz/src/main/java/com/viewshanghai/module/iot/service/device/message/IotDeviceMessageServiceImpl.java
index ea7bd86..bef6ca2 100644
--- a/viewshanghai-module-iot/viewshanghai-module-iot-biz/src/main/java/com/viewshanghai/module/iot/service/device/message/IotDeviceMessageServiceImpl.java
+++ b/viewshanghai-module-iot/viewshanghai-module-iot-biz/src/main/java/com/viewshanghai/module/iot/service/device/message/IotDeviceMessageServiceImpl.java
@@ -23,6 +23,8 @@ import com.viewshanghai.module.iot.dal.tdengine.IotDeviceMessageMapper;
 import com.viewshanghai.module.iot.service.device.IotDeviceService;
 import com.viewshanghai.module.iot.service.device.property.IotDevicePropertyService;
 import com.viewshanghai.module.iot.service.ota.IotOtaTaskRecordService;
+import com.viewshanghai.module.iot.service.product.IotProductService;
+import com.viewshanghai.module.iot.dal.dataobject.product.IotProductDO;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.google.common.base.Objects;
@@ -65,6 +67,9 @@ public class IotDeviceMessageServiceImpl implements IotDeviceMessageService {
 
     @Resource
     private IotDeviceMessageProducer deviceMessageProducer;
+    
+    @Resource
+    private IotProductService productService;
 
     @Override
     public void defineDeviceMessageStable() {
@@ -172,11 +177,21 @@ public class IotDeviceMessageServiceImpl implements IotDeviceMessageService {
         //    条件1：防止对"回复消息"再次回复，避免无限循环
         //    条件2：某些特定的method不需要回复（如设备状态变更、OTA进度上报）
         //    条件3（新增）：HTTP短连接场景，因为已经在请求中直接响应了，不需要再通过消息总线发送回复
+        //    条件4（新增）：JT808 协议由协议处理器自动生成通用应答（0x8001），业务层不需要生成回复消息
         if (IotDeviceMessageUtils.isReplyMessage(message)
                 || IotDeviceMessageMethodEnum.isReplyDisabled(message.getMethod())
                 || StrUtil.isEmpty(message.getServerId())) {
             return; // serverId 为空，不记录回复消息
         }
+        
+        // 检查设备的编解码类型，如果是 JT808，则跳过回复消息生成
+        // JT808 协议的回复由协议处理器（Jt808ProtocolHandler）自动生成通用应答
+        IotProductDO product = productService.getProductFromCache(device.getProductId());
+        if (product != null && "JT808".equals(product.getCodecType())) {
+            log.debug("[handleUpstreamDeviceMessage][JT808 协议消息，跳过业务层回复消息生成，由协议处理器自动生成通用应答]");
+            return;
+        }
+        
         try {
             IotDeviceMessage replyMessage = IotDeviceMessage.replyOf(message.getRequestId(), message.getMethod(), replyData,
                     serviceException != null ? serviceException.getCode() : null,