diff --git a/lib/tasks/shixuns.rake b/lib/tasks/shixuns.rake
new file mode 100644
index 000000000..84f8afd34
--- /dev/null
+++ b/lib/tasks/shixuns.rake
@@ -0,0 +1,22 @@
+#coding=utf-8
+
+
+desc "纠正学生实训耗时不准的问题"
+
+namespace :shixuns do
+  task correct_the_shixun_cost_time: :environment do
+    puts "myshixun_id: #{ENV['myshixun_id']}"
+    if ENV['myshixun_id'].present?
+      myshixun = Myshixun.find(ENV['myshixun_id'])
+      myshixun.games.where(status: 2).each do |game|
+        puts "open_time: #{game.open_time.to_i}"
+        puts "end_time: #{game.end_time.to_i}"
+        puts "game_id: #{game.id}"
+        cost_time = game.end_time.to_i - game.open_time.to_i
+        puts "cost_time: #{cost_time}"
+        game.update_attributes!(cost_time: cost_time)
+      end
+    end
+
+  end
+end
\ No newline at end of file