diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 6bff6c074..5b9e07e84 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -61,7 +61,7 @@ class CoursesController < ApplicationController
     @user = current_user
     # 根据分类查询课堂(全部，我的，最新，最热)
     @order = params[:order].present? ? params[:order] : "all"
-    @courses = current_laboratory.main_site? ? Course.not_deleted : current_laboratory.courses.not_deleted
+    @courses = current_laboratory.courses.not_deleted
     if @order == "visits"
       order_str = "courses.id = 1309 DESC, courses.visits DESC"
       @courses = @courses.where(is_hidden: 0)
diff --git a/app/controllers/subjects_controller.rb b/app/controllers/subjects_controller.rb
index 1346e7368..cbf4fee2b 100644
--- a/app/controllers/subjects_controller.rb
+++ b/app/controllers/subjects_controller.rb
@@ -23,18 +23,27 @@ class SubjectsController < ApplicationController
 
     # 最热排序
     if reorder == "myshixun_count"
-      laboratory_join = current_laboratory.main_site? ? '' : " JOIN laboratory_subjects ls ON ls.subject_id = subjects.id AND ls.laboratory_id = #{current_laboratory.id} "
+      if current_laboratory.main_site?
+        not_subject_ids = Subject.joins(:laboratory_subjects).where("laboratory_subjects.laboratory_id != #{current_laboratory.id}").pluck(:id)
+        not_subject_ids = not_subject_ids.length > 0 ? "(" + not_subject_ids.join(",") + ")" : "(-1)"
+        laboratory_join = " AND subjects.id not in #{not_subject_ids} "
+      else
+        subject_ids = Subject.joins(:laboratory_subjects).where(laboratory_subjects: { laboratory_id: current_laboratory.id }).pluck(:id)
+        subject_ids = subject_ids.length > 0 ? "(" + subject_ids.join(",") + ")" : "(-1)"
+        laboratory_join = " AND subjects.id in #{subject_ids} "
+      end
+
       if select
         @subjects = Subject.find_by_sql("SELECT subjects.id, subjects.user_id, subjects.name, subjects.stages_count, subjects.repertoire_id, subjects.status,
                       subjects.shixuns_count, subjects.excellent, sum(shixuns.myshixuns_count) AS myshixun_member_count FROM subjects join stage_shixuns
-                      on stage_shixuns.subject_id = subjects.id join shixuns on shixuns.id = stage_shixuns.shixun_id #{laboratory_join} where
-                      subjects.hidden = 0 AND subjects.status = 2 AND subjects.name like '%#{search}%'
+                      on stage_shixuns.subject_id = subjects.id join shixuns on shixuns.id = stage_shixuns.shixun_id where
+                      subjects.hidden = 0 AND subjects.status = 2 AND subjects.name like '%#{search}%' #{laboratory_join}
                       AND subjects.repertoire_id = #{select} GROUP BY subjects.id ORDER BY myshixun_member_count DESC")
       else
         @subjects = Subject.find_by_sql("SELECT subjects.id, subjects.user_id, subjects.name, subjects.stages_count, subjects.repertoire_id, subjects.status,
                       subjects.shixuns_count, subjects.excellent, sum(shixuns.myshixuns_count) AS myshixun_member_count FROM subjects join stage_shixuns
-                      on stage_shixuns.subject_id = subjects.id join shixuns on shixuns.id = stage_shixuns.shixun_id #{laboratory_join} where
-                      subjects.hidden = 0 AND subjects.status = 2 AND subjects.name like '%#{search}%'
+                      on stage_shixuns.subject_id = subjects.id join shixuns on shixuns.id = stage_shixuns.shixun_id where
+                      subjects.hidden = 0 AND subjects.status = 2 AND subjects.name like '%#{search}%' #{laboratory_join}
                       GROUP BY subjects.id ORDER BY myshixun_member_count DESC")
       end
     else