diff --git a/APP_Framework/Applications/connection_app/mqtt_demo/lwip_mqtt_demo.c b/APP_Framework/Applications/connection_app/mqtt_demo/lwip_mqtt_demo.c
index 2d7d6fa29..8d51ebd23 100644
--- a/APP_Framework/Applications/connection_app/mqtt_demo/lwip_mqtt_demo.c
+++ b/APP_Framework/Applications/connection_app/mqtt_demo/lwip_mqtt_demo.c
@@ -612,117 +612,5 @@ int32_t MQTTMsgPublish(int32_t sock, char *topic, int8_t qos, uint8_t* msg)
 }
 
 
-static void *MqttSocketSendTask(void *arg)
-{
-
-  int fd = -1, clientfd;
-    int recv_len;
-    int ret;
-    char *recv_buf;
-    struct sockaddr_in mqtt_addr;
-    socklen_t addr_len;
-
-     fd = socket(AF_INET, SOCK_STREAM, 0);
-    if (fd < 0) {
-        lw_print("Socket error\n");
-        return NULL;
-    }
-
-    struct sockaddr_in mqtt_sock;
-    mqtt_sock.sin_family = AF_INET;
-    mqtt_sock.sin_port = htons(mqtt_socket_port);
-    mqtt_sock.sin_addr.s_addr = inet_addr(mqtt_ip_str);
-
-    memset(&(mqtt_sock.sin_zero), 0, sizeof(mqtt_sock.sin_zero));
-
-    ret = connect(fd, (struct sockaddr *)&mqtt_sock, sizeof(struct sockaddr));
-
-    if (ret < 0) {
-        lw_print("Unable to connect %s:%d = %d\n", mqtt_ip_str, mqtt_socket_port, ret);
-        close(fd);
-        return NULL;
-    }
-
-    lw_print("MQTT connect %s:%d success, begin to verify hostname and password.\n", mqtt_ip_str, mqtt_socket_port);
-    
-    if(MQTT_Connect() != Connect_OK)
-    {
-        lw_print("MQTT verify failed.\n");
-        shutdown(fd, SHUT_WR);
-        recv(fd, NULL, (size_t)0, 0);
-        close(fd);
-        return NULL;
-    }
-
-    lw_print("MQTT subscribe begin.\n");
-    if(MQTTSubscribe(fd,(char *)TOPIC,QOS1) < 0)
-    {
-        lw_print("MQTT subscribe failed.\n");
-        shutdown(fd, SHUT_WR);
-        recv(fd, NULL, (size_t)0, 0);
-        close(fd);
-        return NULL;
-    }
-
-    lw_print("subscribe success.\n");
 
 
-
-    uint8_t no_mqtt_msg_exchange = 1;
-    uint32_t curtick=0;
-    uint8_t res;
-
-    cJSON* cJSON_Data = NULL;
-    cJSON_Data = cJSON_Data_Init();
-    DHT11_Data_TypeDef* recv_data;
-
-    double a,b;
-    while(1)
-    {
-      curtick+=1;
-      char* p ="Hello,here is hc";
-      ret = MQTTMsgPublish(fd,(char*)TOPIC,QOS0,(uint8_t*)p);
-      if(ret >= 0)
-      {
-          no_mqtt_msg_exchange = 0;
-          PrivTaskDelay(1000);
-      }
-    }
-}
-
-
-void MqttSocketSendTest(int argc, char *argv[])
-{
-    if(argc >= 2) {
-        lw_print("lw: [%s] target ip %s\n", __func__, argv[1]);
-        MqttSocketConfigParam(argv[1]);
-    }
-
-
-    // ip4_addr_t dns_ip;
-    // netconn_gethostbyname(HOST_NAME, &dns_ip);
-    // char* host_ip = ip_ntoa(&dns_ip);
-    // lw_print("host name : %s , host_ip : %s\n",HOST_NAME,host_ip);
-    // MqttSocketConfigParam(host_ip);
-
-
-#ifdef ADD_XIZI_FEATURES
-    lwip_config_tcp(0, mqtt_demo_ipaddr, mqtt_demo_netmask, mqtt_demo_gwaddr);
-
-    pthread_attr_t attr;
-    attr.schedparam.sched_priority = LWIP_MQTT_DEMO_TASK_PRIO;
-    attr.stacksize = LWIP_MQTT_DEMO_TASK_STACK_SIZE;
-#endif
-
-#ifdef ADD_NUTTX_FEATURES
-    pthread_attr_t attr = PTHREAD_ATTR_INITIALIZER;
-    attr.priority = LWIP_mqtt_DEMO_TASK_PRIO;
-    attr.stacksize = LWIP_mqtt_DEMO_TASK_STACK_SIZE;
-#endif
-
-    PrivTaskCreate(&mqtt_client_task, &attr, &MqttSocketSendTask, NULL);
-    PrivTaskStartup(&mqtt_client_task);
-}
-
-PRIV_SHELL_CMD_FUNCTION(MqttSocketSendTest, a tcp send sample, PRIV_SHELL_CMD_MAIN_ATTR);
-