diff --git a/app/controllers/course_videos_controller.rb b/app/controllers/course_videos_controller.rb
index c5e0358cd..fe01c6226 100644
--- a/app/controllers/course_videos_controller.rb
+++ b/app/controllers/course_videos_controller.rb
@@ -26,14 +26,13 @@ class CourseVideosController < ApplicationController
 
      @watch_course_videos = course_video.watch_course_videos.joins("
        JOIN watch_video_histories ON watch_video_histories.watch_course_video_id = watch_course_videos.id
+       JOIN course_members ON course_members.user_id = watch_course_videos.user_id AND course_members.course_id = #{@course.id} AND role = 4
      ").group("watch_video_histories.watch_course_video_id").where("watch_course_videos.end_at IS NOT NULL").select("watch_course_videos.id")
 
     @count = @watch_course_videos.count.count
 
     if params[:group_id].present?
-      @watch_course_videos = @watch_course_videos.joins("
-        JOIN course_members ON course_members.user_id = watch_course_videos.user_id AND course_members.course_id = #{@course.id}
-      ").where("course_members.course_group_id = ?", params[:group_id])
+      @watch_course_videos = @watch_course_videos.where("course_members.course_group_id = ?", params[:group_id])
     end
 
     @watch_course_videos = @watch_course_videos.select("count(watch_video_histories.id) AS freq, watch_course_videos.*")
diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index bdb5daae1..909f1c11d 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -1494,6 +1494,7 @@ class CoursesController < ApplicationController
         SELECT watch_course_videos.course_video_id, SUM(watch_course_videos.total_duration) AS time, COUNT(watch_course_videos.course_video_id) AS num
         FROM watch_course_videos
         JOIN course_videos ON course_videos.id = watch_course_videos.course_video_id AND watch_course_videos.end_at IS NOT NULL
+        JOIN course_members ON course_members.user_id = watch_course_videos.user_id AND course_members.course_id = #{@course.id} AND role = 4
         WHERE course_videos.course_id = #{@course.id}
         GROUP BY watch_course_videos.course_video_id
       ) AS hisotries ON hisotries.course_video_id = course_videos.id").select("course_videos.id")
@@ -1523,6 +1524,7 @@ class CoursesController < ApplicationController
         SELECT watch_course_videos.course_video_id, COUNT(watch_course_videos.course_video_id) AS num
         FROM watch_course_videos
         JOIN course_videos ON course_videos.id = watch_course_videos.course_video_id
+        JOIN course_members ON course_members.user_id = watch_course_videos.user_id AND course_members.course_id = #{@course.id} AND role = 4
         WHERE course_videos.course_id = #{@course.id} AND watch_course_videos.user_id = #{current_user.id} AND watch_course_videos.end_at IS NOT NULL
         GROUP BY watch_course_videos.course_video_id
       ) AS hisotries ON hisotries.course_video_id = course_videos.id").select("course_videos.id")
@@ -1543,9 +1545,12 @@ class CoursesController < ApplicationController
 
   # 课堂视频的统计总览
   def watch_statics
-    @total_duration = @course.course_videos.joins(:watch_course_videos).sum(:total_duration).round(2)
-    @frequencies = @course.course_videos.joins([watch_course_videos: :watch_video_histories]).count(:id)
-    @people_num = @course.course_videos.joins(:watch_course_videos).count(:id)
+    course_videos = @course.course_videos.joins(:watch_course_videos).joins("
+      JOIN course_members ON course_members.user_id = watch_course_videos.user_id AND course_members.course_id = #{@course.id} AND role = 4
+    ")
+    @total_duration = course_videos.sum(:total_duration).round(0)
+    @frequencies = course_videos.joins("JOIN watch_video_histories ON watch_course_videos.id = watch_video_histories.watch_course_video_id").count(:id)
+    @people_num = course_videos.count(:id)
     render json: {
       total_duration: @total_duration,
       freq: @frequencies,
diff --git a/app/views/course_videos/watch_histories.json.jbuilder b/app/views/course_videos/watch_histories.json.jbuilder
index 705e2d6b7..2babab5d0 100644
--- a/app/views/course_videos/watch_histories.json.jbuilder
+++ b/app/views/course_videos/watch_histories.json.jbuilder
@@ -2,7 +2,7 @@ json.data do
   json.array! @watch_course_videos do |d|
     json.user_name d.user&.real_name
     json.is_finished d.is_finished ? true : false
-    json.total_duration d.total_duration.round(2)
+    json.total_duration d.total_duration.round(0)
     json.feq d['freq']
     json.start_at d.start_at.to_s
     json.end_at d.end_at.to_s
diff --git a/app/views/courses/own_watch_histories.json.jbuilder b/app/views/courses/own_watch_histories.json.jbuilder
index 982939d9c..cc3b31eae 100644
--- a/app/views/courses/own_watch_histories.json.jbuilder
+++ b/app/views/courses/own_watch_histories.json.jbuilder
@@ -3,7 +3,7 @@ json.data do
     json.title d.title
     json.user_name @current_user&.real_name
     json.is_finished d.is_finished ? true : false
-    json.total_duration d.total_duration.round(2)
+    json.total_duration d.total_duration.round(0)
     json.freq d['freq']
     json.start_at d.start_at.to_s
     json.end_at d.end_at.to_s
diff --git a/app/views/courses/watch_video_histories.json.jbuilder b/app/views/courses/watch_video_histories.json.jbuilder
index 207b9029b..8efab4a20 100644
--- a/app/views/courses/watch_video_histories.json.jbuilder
+++ b/app/views/courses/watch_video_histories.json.jbuilder
@@ -4,7 +4,7 @@ json.videos do
     json.title v.title
     json.user_name v.user&.real_name
     json.people_num v['people_num']
-    json.total_time v['total_time']
+    json.total_time v['total_time'].round(0)
   end
 end
 json.count @count
\ No newline at end of file