diff --git a/README.md b/README.md
index 96499e5..6d8f26a 100644
--- a/README.md
+++ b/README.md
@@ -111,6 +111,10 @@ ntp4.aliyun.com
 ntp5.aliyun.com
 ntp6.aliyun.com
 ntp7.aliyun.com
+***用法***
+```dart
+DateTime ntpTime = await NTP.now(lookUpAddress: "ntp.aliyun.com",port: 123);
+```
 
 **Socket链接逻辑**
 将socket链接分成两部分: (链接成功之前，链接成功之后)这里是根据是否有返回消息/结合onDone来判断