diff --git a/rt-thread-version/rt-thread-standard/programming-manual/device/pin/pin.md b/rt-thread-version/rt-thread-standard/programming-manual/device/pin/pin.md
index fb22d4cdf81567437a055b3ff48c90d56440f93c..43854781185e015531edc9a6b48894ece58e0ef6 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/device/pin/pin.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/device/pin/pin.md
@@ -209,7 +209,7 @@ static void pin_beep_sample(void)
 {
     /* 按键0引脚为输入模式 */
     rt_pin_mode(KEY0_PIN_NUM, PIN_MODE_INPUT_PULLUP);
-    /* 绑定中断，上升沿模式，回调函数名为beep_on */
+    /* 绑定中断，下降沿模式，回调函数名为beep_on */
     rt_pin_attach_irq(KEY0_PIN_NUM, PIN_IRQ_MODE_FALLING, beep_on, RT_NULL);
 }
 ```
@@ -245,7 +245,7 @@ static void pin_beep_sample(void)
 {
     /* 按键0引脚为输入模式 */
     rt_pin_mode(KEY0_PIN_NUM, PIN_MODE_INPUT_PULLUP);
-    /* 绑定中断，上升沿模式，回调函数名为beep_on */
+    /* 绑定中断，下降沿模式，回调函数名为beep_on */
     rt_pin_attach_irq(KEY0_PIN_NUM, PIN_IRQ_MODE_FALLING, beep_on, RT_NULL);
     /* 使能中断 */
     rt_pin_irq_enable(KEY0_PIN_NUM, PIN_IRQ_ENABLE);
@@ -282,7 +282,7 @@ static void pin_beep_sample(void)
 {
     /* 按键0引脚为输入模式 */
     rt_pin_mode(KEY0_PIN_NUM, PIN_MODE_INPUT_PULLUP);
-    /* 绑定中断，上升沿模式，回调函数名为beep_on */
+    /* 绑定中断，下降沿模式，回调函数名为beep_on */
     rt_pin_attach_irq(KEY0_PIN_NUM, PIN_IRQ_MODE_FALLING, beep_on, RT_NULL);
     /* 使能中断 */
     rt_pin_irq_enable(KEY0_PIN_NUM, PIN_IRQ_ENABLE);