diff --git a/app/controllers/colleges_controller.rb b/app/controllers/colleges_controller.rb
index fab83063..cc4e6c9a 100644
--- a/app/controllers/colleges_controller.rb
+++ b/app/controllers/colleges_controller.rb
@@ -85,7 +85,7 @@ class CollegesController < ApplicationController
         homeworks = HomeworkCommon.where(:homework_type => 4, :course_id => course_ids.map(&:id))
         un_shixun_work_count = homeworks.where("publish_time > '#{Time.now}' or publish_time is null").count
         shixun_work_count = homeworks.size - un_shixun_work_count
-        student_count = StudentsForCourse.where(:course_id => course_ids.map(&:id)).count
+        student_count = CourseMember.where(:course_id => course_ids.map(&:id), :role => 4).count
         myshixun_ids = StudentWork.select("myshixun_id").where("homework_common_id in (#{homeworks.map(&:id).join(',').strip == "" ? -1 : homeworks.map(&:id).join(',')}) and myshixun_id is not null")
         complete_myshixun = Myshixun.select("id").where(:status => 1, :id => myshixun_ids.map(&:myshixun_id)).size
         all_myshixun = Myshixun.select("id").where(:id => myshixun_ids.map(&:myshixun_id)).size