diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index c27a57c90..94c8a4ec1 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -62,15 +62,12 @@ class CoursesController < ApplicationController
     if @order == "mine"
       @courses = Course.joins(:course_members)
                        .where("is_delete = 0 AND is_hidden = 0 AND course_members.user_id = ?", @user.id)
-                       .order("courses.id = 1309 DESC, courses.#{order_str} DESC")
     elsif @order == "created_at"
       # REDO:Extension
       @courses = Course.where(is_delete: 0, is_hidden: 0, is_end: 0)
-                       .order("courses.id = 1309 DESC, courses.#{order_str} DESC")
     else
       # REDO:Extension
       @courses = Course.where(is_delete: 0, is_hidden: 0)
-                       .order("courses.id = 1309 DESC, courses.#{order_str} DESC")
     end
 
     # 根据搜索关键字进一步筛选
@@ -89,14 +86,15 @@ class CoursesController < ApplicationController
       @courses = @courses.joins(:school, course_members: :user)
                      .where("#{sql}", keyword: "%#{params[:search]}%").distinct
     end
-    @courses_count = @courses.size
+    @courses_count = @courses.count("courses.id")
+    @courses = @courses.order("courses.id = 1309 DESC, courses.#{order_str} DESC")
 
     # 分页
     page  = params[:page]  || 1
     limit = params[:limit] || 16
 
     @courses = @courses.page(page).per(limit)
-    @courses = @courses.preload(:school, teacher: :user_extension)
+    @courses = @courses.preload(:school, :none_hidden_course_modules, teacher: :user_extension)
   end
 
   def visits_plus_one
diff --git a/app/models/course.rb b/app/models/course.rb
index 26672afc2..3794a8b2b 100644
--- a/app/models/course.rb
+++ b/app/models/course.rb
@@ -10,6 +10,7 @@ class Course < ApplicationRecord
   has_many :course_infos, dependent: :destroy
   # 课堂左侧导航栏的模块
   has_many :course_modules, dependent: :destroy
+  has_many :none_hidden_course_modules, -> { not_hidden }, class_name: "CourseModule"
   has_many :board_course_modules, -> { board_module }, class_name: "CourseModule"
   has_many :attachment_course_modules, -> { attachment_module }, class_name: "CourseModule"
   has_many :common_course_modules, -> { common_homework_module }, class_name: "CourseModule"
diff --git a/app/views/courses/index.json.jbuilder b/app/views/courses/index.json.jbuilder
index 2b6866517..32a7047b7 100644
--- a/app/views/courses/index.json.jbuilder
+++ b/app/views/courses/index.json.jbuilder
@@ -11,5 +11,6 @@ json.courses @courses do |course|
     json.is_public course.is_public
     json.is_accessible course.is_public == 1 || @user.course_identity(course) < Course::NORMAL
     json.is_end course.is_end
+    json.first_category_url module_url(course.none_hidden_course_modules.first, course)
 end
 json.courses_count @courses_count