diff --git a/app/api/mobile/apis/cnmooc.rb b/app/api/mobile/apis/cnmooc.rb
index 1f37af91..96b10101 100644
--- a/app/api/mobile/apis/cnmooc.rb
+++ b/app/api/mobile/apis/cnmooc.rb
@@ -22,7 +22,7 @@ module Mobile
 
         desc " 查找用户"
         params do
-          requires :mail, type: String, desc: "邮箱地址"
+          requires :userName, type: String, desc: "好大学用户名"
         end
         get 'find_user' do
           CnmoocsService.new.find_user params