diff --git a/pages/cart/cart2/cart2.js b/pages/cart/cart2/cart2.js
index 8768ba3..41e267c 100644
--- a/pages/cart/cart2/cart2.js
+++ b/pages/cart/cart2/cart2.js
@@ -1658,10 +1658,10 @@ Page({
                    //--------------如果使用余额---------------------
                    if (th.data.bn_use_money == 1) {
                      if (amoney> order_m) {
-                       order_m = order_m.toFixed(2);
+                       order_m = parseFloat(order_m).toFixed(2);
                        th.setData({ [txt]: order_m, [txt2]:0,[txt3]:coupon_price,show_submit:1 })
                      }else{
-                       order_m =parseFloat(order_m - amoney);
+                       order_m =parseFloat(order_m) - parseFloat(amoney);
                        order_m = order_m.toFixed(2);
                        th.setData({ [txt]: amoney, [txt2]: order_m,[txt3]:coupon_price,show_submit:1 })
                      }
@@ -1709,10 +1709,10 @@ Page({
           //--------------如果使用余额---------------------
           if (th.data.bn_use_money == 1) {
             if (amoney> order_m) {
-              order_m = order_m.toFixed(2);
+              order_m = parseFloat(order_m).toFixed(2);
               th.setData({ [txt]: order_m, [txt2]:0,[txt3]:coupon_price,show_submit:1  })
             }else{
-              order_m =parseFloat(order_m - amoney);
+              order_m =parseFloat(order_m) - parseFloat(amoney);
               order_m = order_m.toFixed(2);
               th.setData({ [txt]: amoney, [txt2]: order_m,[txt3]:coupon_price,show_submit:1 })
             }
diff --git a/pages/cart/cart2_pt/cart2_pt.js b/pages/cart/cart2_pt/cart2_pt.js
index 9104849..a857563 100644
--- a/pages/cart/cart2_pt/cart2_pt.js
+++ b/pages/cart/cart2_pt/cart2_pt.js
@@ -455,7 +455,7 @@ Page({
                       if ( parseFloat(th.data.yuer) > total_m) {
                           th.setData({ [txt]: total_m, [txt2]:0 })
                       }else{
-                          order_m = order_m - parseFloat(th.data.yuer);
+                          order_m = parseFloat(order_m) - parseFloat(th.data.yuer);
                           order_m = order_m.toFixed(2);
                           th.setData({ [txt]: th.data.userinfo.yuer, [txt2]: order_m })
                       }