diff --git a/src/sdk-impl/uiot_export.h b/src/sdk-impl/uiot_export.h
index 734b392..bb10a1a 100644
--- a/src/sdk-impl/uiot_export.h
+++ b/src/sdk-impl/uiot_export.h
@@ -58,7 +58,7 @@ extern "C" {
 #define ENABLE_INFINITE_RECONNECT 								    1
 
 /* MQTT连接域名 */
-#define UIOT_MQTT_DIRECT_DOMAIN        						        "mqtt-cn-sh2.ucloud.cn"
+#define UIOT_MQTT_DIRECT_DOMAIN        						        "mqtt-cn-sh2.iot.ucloud.cn"
 
 
 #include "uiot_export_mqtt.h"