diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 7425692c0..2ffc7338e 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -918,6 +918,9 @@ class UsersController < ApplicationController
   end
 
   def show
+    #更新用户申请成为课程老师或教辅消息的状态
+    join_course_messages = CourseMessage.where("course_message_type =? and course_message_id =? and viewed =?", 'JoinCourseRequest', @user.id, false)
+    join_course_messages.update_all(:viewed => true)
     @page = params[:page] ? params[:page].to_i + 1 : 0
     user_project_ids = @user.projects.visible.empty? ? "(-1)" : "(" + @user.projects.visible.map{|project| project.id}.join(",") + ")"
     user_course_ids = @user.courses.visible.empty? ? "(-1)" : "(" + @user.courses.visible.map{|course| course.id}.join(",") + ")"