diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 6bff6c074..5b9e07e84 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -61,7 +61,7 @@ class CoursesController < ApplicationController
     @user = current_user
     # 根据分类查询课堂(全部，我的，最新，最热)
     @order = params[:order].present? ? params[:order] : "all"
-    @courses = current_laboratory.main_site? ? Course.not_deleted : current_laboratory.courses.not_deleted
+    @courses = current_laboratory.courses.not_deleted
     if @order == "visits"
       order_str = "courses.id = 1309 DESC, courses.visits DESC"
       @courses = @courses.where(is_hidden: 0)