diff --git a/packageC/pages/presell/cart/cart.js b/packageC/pages/presell/cart/cart.js
index 422ae33..d548fe6 100644
--- a/packageC/pages/presell/cart/cart.js
+++ b/packageC/pages/presell/cart/cart.js
@@ -668,8 +668,9 @@ Page({
                         order_prom_id = ord_prom['id'];
                         switch (ord_prom['type']) {
                             case 0:
+							    var all_1=o_condition;
                                 o_condition = Math.round(o_condition * ord_prom['expression']) / 100;//满额打折
-                                order_prom_amount = (o_condition - order_m).toFixed(2);
+                                order_prom_amount = (all_1 - o_condition).toFixed(2);
                                 break;
                             case 1:
                                 o_condition = o_condition - ord_prom['expression'];//满额优惠金额