diff --git a/rt-thread-version/rt-thread-standard/programming-manual/device/pwm/pwm.md b/rt-thread-version/rt-thread-standard/programming-manual/device/pwm/pwm.md
index 34a019298386208ddd906a60ffacfe71636bf253..001d67d7eec937c2caeb04463b6ff5659b12961a 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/device/pwm/pwm.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/device/pwm/pwm.md
@@ -99,7 +99,7 @@ rt_err_t rt_pwm_enable(struct rt_device_pwm *device, int channel);
 | **参数**   | **描述**                         |
 | ---------- | ------------------------------- |
 | device  | PWM 设备句柄                        |
-| channel | PWM 通道               |
+| channel | PWM 通道  -channel代表互补通道       |
 | **返回**   | ——                             |
 | RT_EOK     | 设备使能成功                |
 | -RT_ENOSYS | 设备操作方法为空 |