diff --git a/rt-thread-version/rt-thread-standard/tutorial/beep-player/pin.md b/rt-thread-version/rt-thread-standard/tutorial/beep-player/pin.md
index 62c1b0394cd46f9c3d03d5c925bdc5088dba0dda..446d54f36ff7b1d623c526ab1e68d7911a444e85 100644
--- a/rt-thread-version/rt-thread-standard/tutorial/beep-player/pin.md
+++ b/rt-thread-version/rt-thread-standard/tutorial/beep-player/pin.md
@@ -110,7 +110,7 @@ int led_on(void)
 int led_off(void);            //LED 灯灭
 ```
 
-假设 LED 高电平灭，调用 API 输出低电平，使 LED 熄灭。
+假设 LED 高电平灭，调用 API 输出高电平，使 LED 熄灭。
 
 ```c
 int led_off(void)