diff --git a/image/CopyQ.KIoapY.png b/image/CopyQ.KIoapY.png
new file mode 100644
index 0000000000000000000000000000000000000000..66df90f6cf8ac6ee1e5b39ce000ae6d45d259aad
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diff --git a/rt-thread-version/rt-thread-standard/programming-manual/device/uart/uart_v1/uart.md b/rt-thread-version/rt-thread-standard/programming-manual/device/uart/uart_v1/uart.md
index 4977452cd661121a51d5f72a0ca4cbc1e0a03ff4..3c210c86eaa6ce88790340ce7aedbb27c31089cc 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/device/uart/uart_v1/uart.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/device/uart/uart_v1/uart.md
@@ -579,24 +579,36 @@ static void serial_thread_entry(void *parameter)
 {
     struct rx_msg msg;
     rt_err_t result;
-    rt_uint32_t rx_length;
+    rt_uint32_t rx_length = 0;
     static char rx_buffer[RT_SERIAL_RB_BUFSZ + 1];
-
-    while (1)
+    char input;
+    while(1)![输入图片说明](../../../../../../CopyQ.KIoapY.png)
     {
-        rt_memset(&msg, 0, sizeof(msg));
-        /* 从消息队列中读取消息*/
         result = rt_mq_recv(&rx_mq, &msg, sizeof(msg), RT_WAITING_FOREVER);
-        if (result > 0)
+        if(result < 0)
+        {
+            rt_kprintf("mq recv err\n");
+        }
+
+        rt_device_read(msg.dev, 0, &input, 1);
+        rx_buffer[rx_length++] = input;
+        rt_kprintf("input: %c\n",input);
+
+        /* 以回车为缓冲区输出标志 */
+        if(input == '\r')
         {
-            /* 从串口读取数据*/
-            rx_length = rt_device_read(msg.dev, 0, rx_buffer, msg.size);
-            rx_buffer[rx_length] = '\0';
             /* 通过串口设备 serial 输出读取到的消息 */
-            rt_device_write(serial, 0, rx_buffer, rx_length);
+            rt_size_t size = rt_device_write(msg.dev, 0, rx_buffer, sizeof(rx_buffer));
+            if(size != sizeof(rx_buffer))
+            {
+                rt_kprintf("write err\n");
+            }
             /* 打印数据 */
-            rt_kprintf("%s\n",rx_buffer);
-        }
+            rt_kprintf("rx_buffer: %s\n", rx_buffer);
+            /* 重置初始量 */
+            rx_length = 0;
+            rt_memset((void*)rx_buffer, 0, sizeof(rx_buffer));
+        }  
     }
 }
 
@@ -787,3 +799,4 @@ MSH_CMD_EXPORT(uart_data_sample, uart device sample);
 
 ```
 
+![输入图片说明](../../../../../../imageCopyQ.KIoapY.png)![输入图片说明](../../../../../../image/CopyQ.KIoapY.png)
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