diff --git a/app/models/watch_course_video.rb b/app/models/watch_course_video.rb
index cf2d67028..49435da63 100644
--- a/app/models/watch_course_video.rb
+++ b/app/models/watch_course_video.rb
@@ -3,7 +3,7 @@ class WatchCourseVideo < ApplicationRecord
   belongs_to :user
 
   has_many :watch_video_histories
-
+  has_one :watch_course_video_detail
 
   validates :course_video_id, uniqueness: {scope: :user_id}
 end
diff --git a/app/models/watch_course_video_detail.rb b/app/models/watch_course_video_detail.rb
new file mode 100644
index 000000000..714c41f49
--- /dev/null
+++ b/app/models/watch_course_video_detail.rb
@@ -0,0 +1,6 @@
+class WatchCourseVideoDetail < ApplicationRecord
+  belongs_to :user
+  belongs_to :watch_course_video
+
+  serialize :times, Array
+end
diff --git a/app/services/create_watch_video_service.rb b/app/services/create_watch_video_service.rb
index 5a3813571..32dd60819 100644
--- a/app/services/create_watch_video_service.rb
+++ b/app/services/create_watch_video_service.rb
@@ -26,6 +26,7 @@ class CreateWatchVideoService < ApplicationService
           watch_video_history.total_duration = params[:total_duration]
           watch_video_history.watch_duration = params[:watch_duration] > watch_video_history.duration ? watch_video_history.duration : params[:watch_duration]
           watch_video_history.is_finished = params[:ed].present?
+          watch_video_history.last_point = params[:point].to_i
           watch_video_history.save!
 
           watch_course_video = watch_video_history.watch_course_video
@@ -33,6 +34,18 @@ class CreateWatchVideoService < ApplicationService
           if watch_course_video.present?
             watch_course_video.total_duration = watch_course_video.watch_video_histories.sum(:total_duration)
             watch_course_video.end_at = current_time
+
+            if params[:point].to_i > watch_course_video.last_point
+              detail = WatchCourseVideoDetail.find_or_initialize_by(watch_course_video_id: watch_course_video.id, user_id: user.id) do |d|
+                d.times = [[ watch_course_video.last_point, params[:point].to_i]]
+              end
+              if detail.persisted?
+                detail.times << [watch_course_video.last_point, params[:point].to_i]
+              end
+              detail.save
+            end
+            watch_course_video.last_point = params[:point].to_i
+
             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]
@@ -50,8 +63,8 @@ class CreateWatchVideoService < ApplicationService
             d.start_at = current_time
             d.duration = params[:duration]
           end
-
-          watch_course_video.save! unless watch_course_video.persisted?
+          watch_course_video.last_point = params[:point].to_i
+          watch_course_video.save!
           watch_video_history = build_video_log(current_time, course_video.video_id, watch_course_video.id)
           watch_video_history.save!
         else
diff --git a/db/migrate/20200318041550_create_watch_course_video_details.rb b/db/migrate/20200318041550_create_watch_course_video_details.rb
new file mode 100644
index 000000000..07984cb42
--- /dev/null
+++ b/db/migrate/20200318041550_create_watch_course_video_details.rb
@@ -0,0 +1,14 @@
+class CreateWatchCourseVideoDetails < ActiveRecord::Migration[5.2]
+  def change
+    create_table :watch_course_video_details do |t|
+      t.references :user, index: true
+      t.text :times
+      t.references :watch_course_video, index: true
+
+      t.timestamps
+    end
+
+    add_column :watch_course_videos, :last_point, :integer, default: 0
+    add_column :watch_video_histories, :last_point, :integer, default: 0
+  end
+end