diff --git a/APP_Framework/Applications/connection_app/mqtt_demo/Makefile b/APP_Framework/Applications/connection_app/mqtt_demo/Makefile
index 6f459e9f4..d8f57d094 100644
--- a/APP_Framework/Applications/connection_app/mqtt_demo/Makefile
+++ b/APP_Framework/Applications/connection_app/mqtt_demo/Makefile
@@ -1,6 +1,5 @@
 ifeq ($(CONFIG_ADD_XIZI_FETURES),y)
 SRC_FILES += lwip_mqtt_demo.c
-SRC_FILES += online_mqtt.c
 include $(KERNEL_ROOT)/compiler.mk
 endif
 
diff --git a/APP_Framework/Applications/connection_app/mqtt_demo/online_mqtt.c b/APP_Framework/Applications/connection_app/mqtt_demo/online_mqtt.c
deleted file mode 100644
index 64c7f7d1e..000000000
--- a/APP_Framework/Applications/connection_app/mqtt_demo/online_mqtt.c
+++ /dev/null
@@ -1,328 +0,0 @@
-#include <string.h>
-#include <transform.h>
-#include <stdbool.h>
-
-/* lwip includes. */
-#include "lwip/apps/mqtt.h"
-#include "lwip/ip4_addr.h"
-
-
-
-
-static mqtt_client_t *s__mqtt_client_instance = NULL; //mqtt连接句柄，这里一定要设置全局变量，防止 lwip 底层重复申请空间
-
-//MQTT 数据结构体
-struct mqtt_recv_buffer
-{
-    char recv_buffer[1024];  //储存接收的buffer
-    uint16_t recv_len;         //记录已接收多少个字节的数据，MQTT的数据分包来的
-    uint16_t recv_total;       //MQTT接收数据的回调函数会有个总的大小
-};
-
-//结构体初始化
-struct mqtt_recv_buffer s__mqtt_recv_buffer_g = {
-    .recv_len = 0,
-    .recv_total = 0,
-};
-
-
-
-
-
-/*!
-* @brief MQTT 处理失败调用的函数
-*
-* @param [in1] : MQTT 连接句柄
-* @param [in2] : MQTT 连接参数指针
-*
-* @retval: None
-*/
-void mqtt_error_process_callback(mqtt_client_t * client, void *arg)
-{
-    
-}
-
-
-/*!
-* @brief mqtt 接收数据处理函数接口，需要在应用层进行处理
-*        执行条件：mqtt连接成功
-*
-* @param [in1] : 用户提供的回调参数指针
-* @param [in2] : 接收的数据指针
-* @param [in3] : 接收数据长度
-* @retval: 处理的结果
-*/
-int mqtt_rec_data_process(void* arg, char *rec_buf, uint64_t buf_len)
-{
-    lw_print("recv_buffer = %s\n", rec_buf);
-    return 0;
-}
-
-/*!
-* @brief MQTT 订阅的回调函数
-*        执行条件：MQTT 连接成功
-*
-* @param [in] : 用户提供的回调参数指针
-* @param [in] : MQTT 订阅结果
-* @retval: None
-*/
-static void bsp_mqtt_request_cb(void *arg, err_t err)
-{
-    if ( arg == NULL )
-    {
-        lw_print("bsp_mqtt_request_cb: input error@@\n");
-        return;
-    }
-
-    mqtt_client_t *client = (mqtt_client_t *)arg;
-
-    if ( err != ERR_OK )
-    {
-        lw_print("bsp_mqtt_request_cb: FAIL sub, sub again, err = %s\n", lwip_strerr(err));
-
-		//错误处理
-		mqtt_error_process_callback(client, arg);
-    }
-	else
-	{
-		lw_print("bsp_mqtt_request_cb: sub SUCCESS!\n");
-	}
-}
-
-
-/*!
-* @brief mqtt 订阅
-*        执行条件：连接成功
-*
-* @param [in1] : mqtt 连接句柄
-* @param [in2] : mqtt 发送 topic 指针
-* @param [in5] : qos
-* @retval: 订阅状态
-*/
-static err_t bsp_mqtt_subscribe(mqtt_client_t* mqtt_client, char * sub_topic, uint8_t qos)
-{
-    lw_print("bsp_mqtt_subscribe: Enter\n");
-	
-	if( ( mqtt_client == NULL) || ( sub_topic == NULL) || ( qos > 2 ) )
-	{
-        lw_print("bsp_mqtt_subscribe: input error@@\n");
-		return ERR_VAL;
-	}
-
-	if ( mqtt_client_is_connected(mqtt_client) != true )
-	{
-		lw_print("bsp_mqtt_subscribe: mqtt is not connected, return ERR_CLSD.\n");
-		return ERR_CLSD;
-	}
-
-	err_t err;
-	err = mqtt_subscribe(mqtt_client, sub_topic, qos, bsp_mqtt_request_cb, (void *)mqtt_client);  // subscribe and call back.
-
-	if (err != ERR_OK)
-	{
-		lw_print("bsp_mqtt_subscribe: mqtt_subscribe Fail, return:%s \n", lwip_strerr(err));
-	}
-	else
-	{
-		lw_print("bsp_mqtt_subscribe: mqtt_subscribe SUCCESS, reason: %s\n", lwip_strerr(err));
-	}
-
-	return err;
-}
-
-/*!
-* @brief MQTT 连接成功的处理函数，需要的话在应用层定义
-*
-* @param [in1] : MQTT 连接句柄
-* @param [in2] : MQTT 连接参数指针
-*
-* @retval: None
-*/
-
-void mqtt_conn_suc_proc(mqtt_client_t *client, void *arg)
-{
-    char test_sub_topic[] = "/public/TEST/AidenHinGwenWong_sub";
-    bsp_mqtt_subscribe(client,test_sub_topic,0);
-}
-
-
-/*!
-* @brief MQTT 接收到数据的回调函数
-*        执行条件：MQTT 连接成功
-*
-* @param [in1] : 用户提供的回调参数指针
-* @param [in2] : MQTT 收到的分包数据指针
-* @param [in3] : MQTT 分包数据长度
-* @param [in4] : MQTT 数据包的标志位
-* @retval: None
-*/
-static void bsp_mqtt_incoming_data_cb(void *arg, const u8_t *data, u16_t len, u8_t flags)
-{
-    if( (data == NULL) || (len == 0) )
-    {
-        lw_print("mqtt_client_incoming_data_cb: condition error @entry\n");
-        return;
-    }
-    
-    if(s__mqtt_recv_buffer_g.recv_len + len < sizeof(s__mqtt_recv_buffer_g.recv_buffer))
-    {
-        //
-        snprintf(&s__mqtt_recv_buffer_g.recv_buffer[s__mqtt_recv_buffer_g.recv_len], len, "%s", data);
-        s__mqtt_recv_buffer_g.recv_len += len;
-    }
-    
-    if ( (flags & MQTT_DATA_FLAG_LAST) == MQTT_DATA_FLAG_LAST )
-    {
-        //处理数据
-        mqtt_rec_data_process(arg , s__mqtt_recv_buffer_g.recv_buffer, s__mqtt_recv_buffer_g.recv_len);
-        
-        //已接收字节计数归0
-        s__mqtt_recv_buffer_g.recv_len = 0;            
-        
-        //清空接收buffer
-        memset(s__mqtt_recv_buffer_g.recv_buffer, 0, sizeof(s__mqtt_recv_buffer_g.recv_buffer));
-    }
-
-
-    lw_print("mqtt_client_incoming_data_cb:reveiving incomming data.\n");
-}
-
-/*!
-* @brief MQTT 接收到数据的回调函数
-*        执行条件：MQTT 连接成功
-*
-* @param [in] : 用户提供的回调参数指针
-* @param [in] : MQTT 收到数据的topic
-* @param [in] : MQTT 收到数据的总长度
-* @retval: None
-*/
-static void bsp_mqtt_incoming_publish_cb(void *arg, const char *topic, u32_t tot_len)
-{
-    if( (topic == NULL) || (tot_len == 0) )
-    {
-        lw_print("bsp_mqtt_incoming_publish_cb: condition error @entry\n");
-        return;
-    }
-
-	lw_print("bsp_mqtt_incoming_publish_cb: topic = %s.\n",topic);
-	lw_print("bsp_mqtt_incoming_publish_cb: tot_len = %d.\n",tot_len);
-	s__mqtt_recv_buffer_g.recv_total = tot_len;    //需要接收的总字节
-	s__mqtt_recv_buffer_g.recv_len = 0;            //已接收字节计数归0
-    
-    //清空接收buffer
-    memset(s__mqtt_recv_buffer_g.recv_buffer, 0, sizeof(s__mqtt_recv_buffer_g.recv_buffer));
-}
-
-
-/*!
-* @brief MQTT 连接状态的回调函数
-*
-* @param [in] : MQTT 连接句柄
-* @param [in] : 用户提供的回调参数指针
-* @param [in] : MQTT 连接状态
-* @retval: None
-*/
-static void bsp_mqtt_connection_cb(mqtt_client_t *client, void *arg, mqtt_connection_status_t status)
-{
-    if( client == NULL )
-    {
-        lw_print("bsp_mqtt_connection_cb: condition error @entry\n");
-        return;
-    }
-    lw_print("status:%d",status);
-    if ( status == MQTT_CONNECT_ACCEPTED ) //Successfully connected
-    {
-		lw_print("bsp_mqtt_connection_cb: Successfully connected\n");
-        
-        // 注册接收数据的回调函数
-		mqtt_set_inpub_callback(client, bsp_mqtt_incoming_publish_cb, bsp_mqtt_incoming_data_cb, arg);  
-        
-        
-        
-        //成功处理函数
-		mqtt_conn_suc_proc(client, arg);
-    }
-	else
-	{
-		lw_print("bsp_mqtt_connection_cb: Fail connected, status = %s\n", lwip_strerr(status) );
-        //错误处理
-		mqtt_error_process_callback(client, arg);
-	}
-}
-
-static err_t bsp_mqtt_connect(void)
-{
-    lw_print("bsp_mqtt_connect: Enter!\n");
-	err_t ret;
-
-    struct mqtt_connect_client_info_t  mqtt_connect_info = {
-		"Hc_MQTT_Test",  /* 这里需要修改，以免在同一个服务器两个相同ID会发生冲突 */
-		NULL,   /* MQTT 服务器用户名 */
-		NULL,   /* MQTT 服务器密码 */
-		60,     /* 与 MQTT 服务器保持连接时间，时间超过未发送数据会断开 */
-		"/public/TEST/AidenHinGwenWong_pub",/* MQTT遗嘱的消息发送topic */
-		"Offline_pls_check", /* MQTT遗嘱的消息，断开服务器的时候会发送 */
-		0,  /* MQTT遗嘱的消息 Qos */
-		0   /* MQTT遗嘱的消息 Retain */
-	};
-    
-    ip_addr_t server_ip;
-    ip4_addr_set_u32(&server_ip, ipaddr_addr("120.76.100.197"));  //MQTT服务器IP
-
-    uint16_t server_port = 18830;  //注意这里是 MQTT 的 TCP 连接方式的端口号！！！！
-
-    if (s__mqtt_client_instance == NULL)
-    {
-        // 句柄==NULL 才申请空间，否则无需重复申请
-	    s__mqtt_client_instance = mqtt_client_new();
-    }
-
-	if (s__mqtt_client_instance == NULL)
-	{
-        //防止申请失败
-		lw_print("bsp_mqtt_connect: s__mqtt_client_instance malloc fail @@!!!\n");
-		return ERR_MEM;
-	}
-
-    //进行连接,注意：如果需要带入 arg ，arg必须是全局变量，局部变量指针会被回收，大坑！！！！！
-    ret = mqtt_client_connect(s__mqtt_client_instance, &server_ip, server_port, bsp_mqtt_connection_cb, NULL, &mqtt_connect_info);
-
-    /******************
-    小提示：连接错误不需要做任何操作，mqtt_client_connect 中注册的回调函数里面做判断并进行对应的操作
-    *****************/
-    
-    lw_print("bsp_mqtt_connect: connect to mqtt %s\n", lwip_strerr(ret));
-
-	return ret;
-}
-
-
-/* ===========================================
-                 初始化接口函数
-============================================== */
-
-/*!
-* @brief 封装 MQTT 初始化接口
-*        执行条件：无
-*
-* @retval: 无
-*/
-void MQTTOnline(void)
-{	
-    lw_print("Mqtt init...");
-        
-    // 连接服务器
-    bsp_mqtt_connect();
-    
-    // 发送消息到服务器
-    // char message_test[] = "Hello mqtt server";
-    // for(int i = 0; i < 10; i++)
-    // {
-    //     bsp_mqtt_publish(s__mqtt_client_instance,"/public/TEST/AidenHinGwenWong_pub",message_test,sizeof(message_test),1,0);
-    //     PrivTaskDelay(1000);  
-    // }
-    
-}
-
-
-PRIV_SHELL_CMD_FUNCTION(MQTTOnline, a tcp send sample, PRIV_SHELL_CMD_MAIN_ATTR);
diff --git a/APP_Framework/Applications/connection_app/mqtt_demo/online_mqtt.h b/APP_Framework/Applications/connection_app/mqtt_demo/online_mqtt.h
deleted file mode 100644
index abac5506f..000000000
--- a/APP_Framework/Applications/connection_app/mqtt_demo/online_mqtt.h
+++ /dev/null
@@ -1,29 +0,0 @@
-
-#ifndef __BSP_MQTT_H
-#define __BSP_MQTT_H
-
-/*-----------------------------------------------------------
- * Includes files
- *----------------------------------------------------------*/
-
-/*-----------------------------------------------------------
- * Exported constants
- *----------------------------------------------------------*/
-
-
-/*-----------------------------------------------------------
- * Exported macro
- *----------------------------------------------------------*/
-
-/*-----------------------------------------------------------
- * Exported function
- *----------------------------------------------------------*/
-/*!
-* @brief 封装 MQTT 初始化接口
-*        执行条件：无
-*
-* @retval: 无
-*/
-void bsp_mqtt_init(void);
-
-#endif /* __BSP_WOLFSSL_H */
diff --git a/Ubiquitous/XiZi_IIoT/resources/ethernet/LwIP/apps/Makefile b/Ubiquitous/XiZi_IIoT/resources/ethernet/LwIP/apps/Makefile
index 03bc603dd..6f5f2913e 100644
--- a/Ubiquitous/XiZi_IIoT/resources/ethernet/LwIP/apps/Makefile
+++ b/Ubiquitous/XiZi_IIoT/resources/ethernet/LwIP/apps/Makefile
@@ -1,3 +1,3 @@
 SRC_FILES += lwiperf/lwiperf.c http/http_client.c
-SRC_FILES += mqtt/mqtt.c
+
 include $(KERNEL_ROOT)/compiler.mk