diff --git a/app/controllers/oauth/ci4s_controller.rb b/app/controllers/oauth/ci4s_controller.rb
index 7ccc444bb..543466563 100644
--- a/app/controllers/oauth/ci4s_controller.rb
+++ b/app/controllers/oauth/ci4s_controller.rb
@@ -2,6 +2,10 @@ class Oauth::Ci4sController < Oauth::BaseController
   include RegisterHelper
 
 
+  def oauth_url
+    Ci4s::Service.oauth_url(code)
+  end
+
   # 需要educoder那边设置回调地址
   def create
     begin
diff --git a/app/libs/ci4s/service.rb b/app/libs/ci4s/service.rb
index 57cd753b3..c67ccf5b9 100644
--- a/app/libs/ci4s/service.rb
+++ b/app/libs/ci4s/service.rb
@@ -23,6 +23,9 @@ module Ci4s::Service
     config.dig("oauth", "ci4s", "redirect_uri")
   end
 
+  def oauth_url
+    "#{base_url}/oauth/authorize?client_id=#{client_id}&redirect_uri=#{URI.encode_www_form_component(redirect_uri)}&response_type=code&grant_type=authorization_code"
+  end
 
   def request(method, url, params)
     begin 
diff --git a/config/routes.rb b/config/routes.rb
index 6a8677322..3e9145ae7 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -26,6 +26,7 @@ Rails.application.routes.draw do
   get 'auth/failure', to: 'oauth/base#auth_failure'
   get 'auth/cas/callback', to: 'oauth/cas#create'
   get 'auth/acge/callback', to: "oauth/acge#create"
+  get 'oauth_ci4s', to: "oauth/ci4s#oauth_url"
   get 'auth/ci4s/callback', to: "oauth/ci4s#create"
   get 'auth/acge/refer', to: "oauth/acge#refer"
   get 'auth/:provider/callback', to: 'oauth/callbacks#create'