diff --git a/app/controllers/games_controller.rb b/app/controllers/games_controller.rb
index 614008112..75e2827a2 100644
--- a/app/controllers/games_controller.rb
+++ b/app/controllers/games_controller.rb
@@ -785,7 +785,7 @@ class GamesController < ApplicationController
   # REDO:需要添加详细的说明
   def cost_time
     #return if @game.status >= 2
-    cost_time = params[:time].to_i < @game.cost_time.to_i ? (@game.cost_time.to_i + params[:time].to_i) : params[:time].to_i
+    cost_time = params[:time].to_i < @game.cost_time.to_i ? (@game.cost_time.to_i) : params[:time].to_i
     @game.update_attribute(:cost_time, cost_time)
   end