diff --git a/sa-token-doc/doc/oauth2/oauth2-api.md b/sa-token-doc/doc/oauth2/oauth2-api.md
index 7d1db796..52009a9a 100644
--- a/sa-token-doc/doc/oauth2/oauth2-api.md
+++ b/sa-token-doc/doc/oauth2/oauth2-api.md
@@ -14,7 +14,7 @@ http://sa-oauth-server.com:8001/oauth2/authorize
 	&client_id={value}
 	&redirect_uri={value}
 	&scope={value}
-	$state={value}
+	&state={value}
 ```
 
 参数详解：