diff --git a/database/migrations/20200318085203_change_admin_menu_field.php b/database/migrations/20200318085203_change_admin_menu_field.php
index 8707b35..d597cd3 100644
--- a/database/migrations/20200318085203_change_admin_menu_field.php
+++ b/database/migrations/20200318085203_change_admin_menu_field.php
@@ -41,10 +41,6 @@ class ChangeAdminMenuField extends Migrator {
                 'limit'   => 255,
                 'default' => '',
                 'comment' => '前端组件'
-            ])->addColumn('class_name', 'string', [
-                'limit'   => 255,
-                'default' => '',
-                'comment' => '后端类库'
             ])->addColumn('router', 'string', [
                 'limit'   => 255,
                 'default' => '',