diff --git a/app/controllers/colleges_controller.rb b/app/controllers/colleges_controller.rb
index 1ffcdb46..ad831e78 100644
--- a/app/controllers/colleges_controller.rb
+++ b/app/controllers/colleges_controller.rb
@@ -50,7 +50,8 @@ class CollegesController < ApplicationController
     # Redo：这样做内存会卡死的
     # user_ids = User.find_by_sql("SELECT users.id FROM users LEFT JOIN user_extensions ON users.id=user_extensions.user_id WHERE user_extensions.`school_id` = #{@school.id}").map(&:id)
     # Redo：是否直接使用count会更好
-    all_course_ids = Course.joins("join users u on courses.tea_id = u.id").joins("join user_extensions ue on u.id = ue.user_id").where("courses.id != 1309 and ue.school_id = #{@school.id}")
+    all_course_ids = Course.joins("join users u on courses.tea_id = u.id").joins("join user_extensions ue on u.id = ue.user_id").
+        where("courses.id != 1309 and courses.is_delete = 0 and ue.school_id = #{@school.id}")
     @courses_count = all_course_ids.size
 
     # Redo：对于量比较大的尽量不使用笛卡尔积