diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 209c5370d..921262106 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -425,9 +425,9 @@ class UsersController < ApplicationController
     homework = HomeworkCommon.find params[:homework].to_i
     if !params[:search].nil?
       search = "%#{params[:search].to_s.strip.downcase}%"
-      @course = @user.courses.where("#{Course.table_name}.id != #{homework.course_id} and #{Course.table_name}.id = #{params[:search].to_i } or #{Course.table_name}.name like :p",:p=>search).select { |course|  @user.allowed_to?(:as_teacher,course)}
+      @course = @user.courses.where("is_delete = 0 and #{Course.table_name}.id != #{homework.course_id} and #{Course.table_name}.id = #{params[:search].to_i } or #{Course.table_name}.name like :p",:p=>search).select { |course|  @user.allowed_to?(:as_teacher,course)}
     else
-      @course = @user.courses.where("#{Course.table_name}.id != #{homework.course_id}").select { |course|  @user.allowed_to?(:as_teacher,course)}
+      @course = @user.courses.where("is_delete = 0 and #{Course.table_name}.id != #{homework.course_id}").select { |course|  @user.allowed_to?(:as_teacher,course)}
     end
     @search = params[:search]
     #这里仅仅是传递需要发送的资源id