diff --git a/components/connectivity/TencentCloud_SDK/source/include/qcloud_err.h b/components/connectivity/TencentCloud_SDK/source/include/qcloud_err.h
index b64a8473..97fa5fb2 100644
--- a/components/connectivity/TencentCloud_SDK/source/include/qcloud_err.h
+++ b/components/connectivity/TencentCloud_SDK/source/include/qcloud_err.h
@@ -1,5 +1,5 @@
 #ifndef _QCLOUD_ERR_H_
-#define  _QCLOUD_ERR_H_
+#define _QCLOUD_ERR_H_
 
 typedef enum qcloud_err_en {
     QCLOUD_ERR_MQTT_ALREADY_CONNECTED                        = 4,       // 表示与MQTT服务器已经建立连接
@@ -98,13 +98,13 @@ typedef enum qcloud_err_en {
     QCLOUD_ERR_SSL_READ                                      = -708,    // 表示SSL读错误
     QCLOUD_ERR_SSL_NOTHING_TO_READ                           = -709,    // 表示底层没有数据可以读取
 
-    QCLOUD_ERR_UDP_SOCKET_FAILED                             = -601,    // 表示TCP连接建立套接字失败
+    QCLOUD_ERR_UDP_SOCKET_FAILED                             = -601,    // 表示UDP连接建立套接字失败
     QCLOUD_ERR_UDP_UNKNOWN_HOST                              = -602,    // 表示无法通过主机名获取IP地址
-    QCLOUD_ERR_UDP_CONNECT                                   = -603,    // 表示建立TCP连接失败
-    QCLOUD_ERR_UDP_READ_TIMEOUT                              = -604,    // 表示TCP读超时
-    QCLOUD_ERR_UDP_WRITE_TIMEOUT                             = -605,    // 表示TCP写超时
-    QCLOUD_ERR_UDP_READ_FAIL                                 = -606,    // 表示TCP读错误
-    QCLOUD_ERR_UDP_WRITE_FAIL                                = -607,    // 表示TCP写错误
+    QCLOUD_ERR_UDP_CONNECT                                   = -603,    // 表示建立UDP连接失败
+    QCLOUD_ERR_UDP_READ_TIMEOUT                              = -604,    // 表示UDP读超时
+    QCLOUD_ERR_UDP_WRITE_TIMEOUT                             = -605,    // 表示UDP写超时
+    QCLOUD_ERR_UDP_READ_FAIL                                 = -606,    // 表示UDP读错误
+    QCLOUD_ERR_UDP_WRITE_FAIL                                = -607,    // 表示UDP写错误
     QCLOUD_ERR_UDP_NOTHING_TO_READ                           = -609,    // 表示底层没有数据可以读取
 } qcloud_err_t;
 
diff --git a/components/connectivity/TencentCloud_SDK/source/src/port/TencentOS_tiny/osal_udp_module.c b/components/connectivity/TencentCloud_SDK/source/src/port/TencentOS_tiny/osal_udp_module.c
index 9e6ab56d..a72d8ba4 100644
--- a/components/connectivity/TencentCloud_SDK/source/src/port/TencentOS_tiny/osal_udp_module.c
+++ b/components/connectivity/TencentCloud_SDK/source/src/port/TencentOS_tiny/osal_udp_module.c
@@ -33,7 +33,7 @@ __QCLOUD_OSAL__ int osal_udp_connect(const char *host, uint16_t port)
 	fd = tos_sal_module_connect("111.230.127.136", "5684", TOS_SAL_PROTO_UDP);
 	if (fd < 0) {
 		QCLOUD_LOG_I("net connect fail\n\r");
-		if (QCLOUD_ERR_SUCCESS == tos_sal_module_init()) { /* ���³�ʼ��ģ�� */
+		if (QCLOUD_ERR_SUCCESS == tos_sal_module_init()) { /* ÖØгõʼ»¯Ä£×é */
 			QCLOUD_LOG_I("net reinit success\n\r");
 			fd = tos_sal_module_connect(host, port_str, TOS_SAL_PROTO_UDP);
 			if (fd < 0) {
@@ -63,7 +63,7 @@ __QCLOUD_OSAL__ qcloud_err_t osal_udp_write(int sockfd, const void *buf, size_t
     ret = tos_sal_module_sendto(sockfd, NULL, NULL, buf, len);
 
     if (ret < 0) {
-        return QCLOUD_ERR_TCP_WRITE_FAIL;
+        return QCLOUD_ERR_UDP_WRITE_FAIL;
     }
 
     (*(int *)write_len) = ret;
@@ -79,11 +79,11 @@ __QCLOUD_OSAL__ qcloud_err_t osal_udp_read(int sockfd, void *buf, size_t len, ui
     ret = tos_sal_module_recvfrom_timeout(sockfd, buf, len, timeout);
 
     if (ret < 0) {
-        return QCLOUD_ERR_TCP_READ_FAIL;
+        return QCLOUD_ERR_UDP_READ_FAIL;
     }
 
     if (ret == 0) {
-        return QCLOUD_ERR_TCP_NOTHING_TO_READ;
+        return QCLOUD_ERR_UDP_NOTHING_TO_READ;
     }
 
     *(int *)read_len = ret;
diff --git a/components/connectivity/TencentCloud_SDK/source/src/port/TencentOS_tiny/osal_udp_socket.c b/components/connectivity/TencentCloud_SDK/source/src/port/TencentOS_tiny/osal_udp_socket.c
index c44ce1c6..e1bfef8e 100644
--- a/components/connectivity/TencentCloud_SDK/source/src/port/TencentOS_tiny/osal_udp_socket.c
+++ b/components/connectivity/TencentCloud_SDK/source/src/port/TencentOS_tiny/osal_udp_socket.c
@@ -40,7 +40,7 @@ __QCLOUD_OSAL__ int osal_udp_connect(const char *host, uint16_t port)
     hints.ai_family = AF_INET;
     hints.ai_protocol = IPPROTO_UDP;
 
-    QCLOUD_LOG_D("establish tcp connection with server(host=%s port=%s)", host, port_str);
+    QCLOUD_LOG_D("establish udp connection with server(host=%s port=%s)", host, port_str);
 
     if (getaddrinfo(host, port_str, &hints, &addr_list) != 0) {
         QCLOUD_LOG_E("getaddrinfo error,errno:%s", strerror(errno));
@@ -98,7 +98,7 @@ __QCLOUD_OSAL__ qcloud_err_t osal_udp_read(int sockfd, void *buf, size_t len, ui
     fd_set read_fds;
 
     if (sockfd < 0) {
-        return QCLOUD_ERR_TCP_READ_FAIL;
+        return QCLOUD_ERR_UDP_READ_FAIL;
     }
 
     FD_ZERO(&read_fds);