diff --git a/components/cart/cart.vue b/components/cart/cart.vue
index 7c48b3e3..243c25a0 100644
--- a/components/cart/cart.vue
+++ b/components/cart/cart.vue
@@ -840,35 +840,76 @@
                     app.globalData.set_tab_bar_badge(2, 0);
                 } else {
                     app.globalData.set_tab_bar_badge(2, 1, cart_total);
-                }
+                }
+
+                // 调用预下单处理、优惠信息
+                this.pre_order_handle();
+            },
+
+            // 预下单处理
+            pre_order_handle() {
+                var data = this.buy_data_params();
+                if (data !== false) {
+                    uni.request({
+                        url: app.globalData.get_request_url('index', 'buy'),
+                        method: 'POST',
+                        data: data,
+                        dataType: 'json',
+                        success: (res) => {
+                            if (res.data.code == 0) {
+                                var data = res.data.data;
+                                this.setData({
+                                    total_price: data.base.actual_price,
+                                    total_num: data.base.buy_count,
+                                });
+                            } else {
+                                app.globalData.showToast(res.data.msg);
+                            }
+                        },
+                        fail: () => {
+                            app.globalData.showToast('网络开小差了哦~');
+                        },
+                    });
+                }
+            },
+
+            // 结算数据参数
+            buy_data_params() {
+                var selected_count = 0;
+                var ids = [];
+                var temp_data_list = this.data_list || [];
+                for (var i in temp_data_list) {
+                    if ((temp_data_list[i]['is_error'] || 0) == 0 && (temp_data_list[i]['selected'] || false) == true) {
+                        ids.push(temp_data_list[i]['id']);
+                        selected_count++;
+                    }
+                }
+                if (selected_count <= 0) {
+                    return false;
+                }
+                
+                // 结算参数
+                var data = {
+                    buy_type: 'cart',
+                    ids: ids.join(','),
+                };
+                // 是否门店模式
+                if(this.cart_type_value == 'realstore' && (this.plugins_realstore_info || null) != null) {
+                    data['realstore_id'] = this.plugins_realstore_info.id;
+                    data['buy_use_type_index'] = this.plugins_realstore_buy_use_type_index;
+                }
+                return data;
             },
 
             // 结算
-            buy_submit_event(e) {
-                var selected_count = 0;
-                var ids = [];
-                var temp_data_list = this.data_list || [];
-                for (var i in temp_data_list) {
-                    if ((temp_data_list[i]['is_error'] || 0) == 0 && (temp_data_list[i]['selected'] || false) == true) {
-                        ids.push(temp_data_list[i]['id']);
-                        selected_count++;
-                    }
-                }
-                if (selected_count <= 0) {
+            buy_submit_event(e) {
+                // 结算参数
+                var data = this.buy_data_params();
+                if (data === false) {
                     app.globalData.showToast('请先选择商品');
                     return false;
-                }
+                }
 
-                // 结算参数
-                var data = {
-                    buy_type: 'cart',
-                    ids: ids.join(','),
-                };
-                // 是否门店模式
-                if(this.cart_type_value == 'realstore' && (this.plugins_realstore_info || null) != null) {
-                    data['realstore_id'] = this.plugins_realstore_info.id;
-                    data['buy_use_type_index'] = this.plugins_realstore_buy_use_type_index;
-                }
                 // 进入结算页面
                 uni.navigateTo({
                     url: '/pages/buy/buy?data=' + encodeURIComponent(base64.encode(JSON.stringify(data))),