diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index b76673945..01ce1f6e8 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -913,7 +913,7 @@ class CoursesController < ApplicationController
   def left_banner
     @user = current_user
     @is_teacher = @user.teacher_of_course?(@course)
-    @course_modules = @course.course_modules.where.not(module_type: "activity").where(hidden: 0)
+    @course_modules = @course.course_modules.where(hidden: 0)
     @hidden_modules = @course.course_modules.where(hidden: 1)
     @second_category_type = ["shixun_homework", "graduation", "attachment", "board", "course_group"]
   end
diff --git a/app/models/course.rb b/app/models/course.rb
index a2f5add51..7729a2650 100644
--- a/app/models/course.rb
+++ b/app/models/course.rb
@@ -7,7 +7,7 @@ class Course < ApplicationRecord
 
   has_many :course_infos, dependent: :destroy
   # 课堂左侧导航栏的模块
-  has_many :course_modules, -> {where hidden: 0}, dependent: :destroy
+  has_many :course_modules, dependent: :destroy
   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/models/course_module.rb b/app/models/course_module.rb
index 7b96a044f..641c70425 100644
--- a/app/models/course_module.rb
+++ b/app/models/course_module.rb
@@ -7,6 +7,7 @@ class CourseModule < ApplicationRecord
 
   validates :module_name, length: { maximum: 20 }
 
+  scope :not_hidden,                   -> { where(hidden: 0) }
   scope :graduation_module,            -> { where(module_type: "graduation") }
   scope :graduation_module_not_hidden, -> { graduation_module.where(hidden: 0) }
   scope :board_module,                 -> { where(module_type: 'board') }
diff --git a/app/views/courses/index.json.jbuilder b/app/views/courses/index.json.jbuilder
index 1993851e8..5a128a0b7 100644
--- a/app/views/courses/index.json.jbuilder
+++ b/app/views/courses/index.json.jbuilder
@@ -12,7 +12,7 @@ json.courses do
     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.course_modules.first, course)
+    json.first_category_url module_url(course.course_modules.not_hidden.first, course)
   end
 end
 json.courses_count @courses_count
diff --git a/app/views/users/courses/shared/_course.json.jbuilder b/app/views/users/courses/shared/_course.json.jbuilder
index e5823212e..629f47264 100644
--- a/app/views/users/courses/shared/_course.json.jbuilder
+++ b/app/views/users/courses/shared/_course.json.jbuilder
@@ -4,7 +4,7 @@ json.members_count course.members_count
 json.homework_commons_count course.homework_commons_count
 json.attachments_count course.attachments.count
 
-json.first_category_url module_url(course.course_modules.where.not(module_type: "activity").where(hidden: 0).order(position: :desc).first, course)
+json.first_category_url module_url(course.course_modules.where(hidden: 0).order(position: :desc).first, course)
 
 json.is_public course.is_public
 json.can_visited observed_logged_user? || course.can_visited?