diff --git a/app/controllers/shixuns_controller.rb b/app/controllers/shixuns_controller.rb
index 59dd20633..bb475abcd 100644
--- a/app/controllers/shixuns_controller.rb
+++ b/app/controllers/shixuns_controller.rb
@@ -467,7 +467,13 @@ class ShixunsController < ApplicationController
 	def update_learn_setting
 		begin
 			ActiveRecord::Base.transaction do
-				@shixun.update_attributes!(shixun_params.merge(vnc_evaluate: 1))
+				update_params =
+						if params[:shixun][:vnc]
+							shixun_params.merge(vnc_evaluate: 1)
+						else
+							shixun_params
+						end
+				@shixun.update_attributes!(update_params)
 			end
 		rescue => e
 			uid_logger_error("实训学习页面设置失败--------#{e.message}")