diff --git a/threadfunc/SH_ThreadFunc.cpp b/threadfunc/SH_ThreadFunc.cpp
index ecea19b..f7393cb 100644
--- a/threadfunc/SH_ThreadFunc.cpp
+++ b/threadfunc/SH_ThreadFunc.cpp
@@ -25,6 +25,7 @@ static long long connect_lost_time = 0; //ms
 static long long connect_time = 0; //ms
 
 Dial dial;
+int fd  = -1;
 
 void CheckThread()
 {
@@ -126,7 +127,15 @@ void CheckThread()
 			iRet = data_publish(str2.c_str(), GlobalConfig::Topic_G.mPubCmd.c_str());
             if(iRet != 0 )
             {
-            	LOG_ERROR("MQTT connect failed ,time check\n");
+				LOG_ERROR("MQTT connect failed ,time check\n");
+#ifdef Q4G_MODULE
+				if(fd){
+					LOG_ERROR("MQTT connect failed ,4G Module\n");
+					write_data(fd,"AT+CFUN=1,1\r\n",15);
+					system("reboot");
+				}
+#endif				
+            	
 #ifdef IMX6UL_GATEWAY
 				char connect[10]={0x00};		
 				readStringValue("config", "connect",connect,(char*)GlobalConfig::Config_G.c_str());
@@ -567,7 +576,7 @@ open5G:
 #endif
 #ifdef Q4G_MODULE
 	//4G
-	int fd  = -1;
+	
 open4G:
 	fd = config_uart("/dev/ttyUSB2",115200);
 	if (fd < 0){