diff --git a/components/drivers/serial/serial.c b/components/drivers/serial/serial.c
index c2cc2f615c..cb4c40c7c2 100644
--- a/components/drivers/serial/serial.c
+++ b/components/drivers/serial/serial.c
@@ -24,6 +24,7 @@
  * 2018-12-08     Ernest Chen  add DMA choice
  * 2020-09-14     WillianChan  add a line feed to the carriage return character
  *                             when using interrupt tx
+ * 2020-12-14     Meco Man     add function of setting window's size(TIOCSWINSZ)
  */
 
 #include <rthw.h>
@@ -1012,7 +1013,7 @@ static rt_err_t rt_serial_control(struct rt_device *dev,
             }
 
             break;
-
+#ifdef RT_USING_POSIX
 #ifdef RT_USING_POSIX_TERMIOS
         case TCGETA:
             {
@@ -1104,8 +1105,7 @@ static rt_err_t rt_serial_control(struct rt_device *dev,
             break;
         case TCXONC:
             break;
-#endif
-#ifdef RT_USING_POSIX
+#endif /*RT_USING_POSIX_TERMIOS*/
         case FIONREAD:
             {
                 rt_size_t recved = 0;
@@ -1118,7 +1118,15 @@ static rt_err_t rt_serial_control(struct rt_device *dev,
                 *(rt_size_t *)args = recved;
             }
             break;
-#endif
+        case TIOCSWINSZ:
+            {
+                struct winsize* p_winsize;
+
+                p_winsize = (struct winsize*)args;
+                rt_kprintf("\x1b[8;%d;%dt", p_winsize->ws_col, p_winsize->ws_row);
+            }
+            break;
+#endif /*RT_USING_POSIX*/
         default :
             /* control device */
             ret = serial->ops->control(serial, cmd, args);