diff --git a/rt-thread-version/rt-thread-standard/programming-manual/interrupt/interrupt.md b/rt-thread-version/rt-thread-standard/programming-manual/interrupt/interrupt.md
index dab926d38b0bbf21bcfa83e76c219f552a3ac714..6483c68e29903b0345298308e59d8aa2eab55a19 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/interrupt/interrupt.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/interrupt/interrupt.md
@@ -371,6 +371,7 @@ void rt_hw_interrupt_enable(rt_base_t level);
 ```c
     /* 关闭中断 */
     level = rt_hw_interrupt_disable();
+    /* 执行互斥操作 */
     a = a + value;
     /* 恢复中断 */
     rt_hw_interrupt_enable(level);
@@ -381,6 +382,7 @@ void rt_hw_interrupt_enable(rt_base_t level);
 ```c
     /* 获得信号量锁 */
     rt_sem_take(sem_lock, RT_WAITING_FOREVER);
+    /* 执行互斥操作 */
     a = a + value;
     /* 释放信号量锁 */
     rt_sem_release(sem_lock);
@@ -511,6 +513,7 @@ void thread_entry(void *parameter)
     {
         /* 关闭全局中断 */
         level = rt_hw_interrupt_disable();
+        /* 执行互斥操作 */
         cnt += no;
         /* 恢复全局中断 */
         rt_hw_interrupt_enable(level);