diff --git a/app/api/mobile/apis/auth.rb b/app/api/mobile/apis/auth.rb
index fbec9a3b0..9e4cb1bc6 100644
--- a/app/api/mobile/apis/auth.rb
+++ b/app/api/mobile/apis/auth.rb
@@ -26,7 +26,7 @@ module Mobile
             present :data, {token: key.access_token, user: api_user}, using: Entities::Auth
             present :status, 0
           else
-            raise 'Unauthorized.'
+            raise "无效的用户名或密码"
           end
         end