diff --git a/README.md b/README.md
index 17adb4b..d35afa9 100644
--- a/README.md
+++ b/README.md
@@ -38,4 +38,10 @@ if ($access_token != '') {
     $email = $ssoUserInfo->email;
 }
 
+```
+
+```$php
+$url_back = {return_url};
+$objSso = new SsoClientLibrary();
+$objSso->ssoLogout($url_back);
 ```
\ No newline at end of file
diff --git a/src/SsoClientLibrary.php b/src/SsoClientLibrary.php
index 315e9d1..8cfa98f 100644
--- a/src/SsoClientLibrary.php
+++ b/src/SsoClientLibrary.php
@@ -125,4 +125,14 @@ class SsoClientLibrary {
         die('Something went wrong, please trace back your action!');
     }
 
+    public function ssoLogout($url_back = '') {
+        $query = http_build_query([
+            'url_back' => $url_back,
+        ]);
+
+        $_url = $this->targetUri ."sso/logout?" . $query;
+        header("Location: " . $_url);
+        die();
+    }
+
 }
\ No newline at end of file