diff --git a/app/services/create_watch_video_service.rb b/app/services/create_watch_video_service.rb
index 32dd60819..49127a01f 100644
--- a/app/services/create_watch_video_service.rb
+++ b/app/services/create_watch_video_service.rb
@@ -49,7 +49,9 @@ class CreateWatchVideoService < ApplicationService
             if !watch_course_video.is_finished
               # 更新课程视频的时长及是否看完状态
               watch_course_video.watch_duration = params[:watch_duration] if watch_course_video.watch_duration < params[:watch_duration]
-              watch_course_video.is_finished = watch_course_video.total_duration >= watch_course_video.duration if params[:ed].present?
+              if params[:ed].present? || (watch_course_video.duration >= 300 && (watch_course_video.duration - params[:point].to_i) <= 20)
+                watch_course_video.is_finished = watch_course_video.total_duration >= watch_course_video.duration
+              end
             end
             watch_course_video.save!
           end