diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/controller/OrderController.java b/src/main/java/com/chaozhanggui/system/cashierservice/controller/OrderController.java
index a0bf2fd..5fe8f00 100644
--- a/src/main/java/com/chaozhanggui/system/cashierservice/controller/OrderController.java
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/controller/OrderController.java
@@ -4,10 +4,7 @@ import cn.hutool.core.date.DateUtil;
 import cn.hutool.core.util.StrUtil;
 import com.alibaba.fastjson.JSONObject;
 import com.chaozhanggui.system.cashierservice.entity.OrderVo;
-import com.chaozhanggui.system.cashierservice.entity.dto.AddTemporaryDishesDTO;
-import com.chaozhanggui.system.cashierservice.entity.dto.ChoseCountDTO;
-import com.chaozhanggui.system.cashierservice.entity.dto.ReturnCartDTO;
-import com.chaozhanggui.system.cashierservice.entity.dto.UpdateVipDTO;
+import com.chaozhanggui.system.cashierservice.entity.dto.*;
 import com.chaozhanggui.system.cashierservice.entity.vo.CartVo;
 import com.chaozhanggui.system.cashierservice.service.OrderService;
 import com.chaozhanggui.system.cashierservice.sign.CodeEnum;
@@ -45,7 +42,7 @@ public class OrderController {
         String userId = jsonObject.getString("accountId");
         return orderService.createCart(cartVo.getMasterId(), cartVo.getProductId(), cartVo.getShopId(), cartVo.getSkuId(),
                 cartVo.getNumber(), userId, clientType, cartVo.getCartId(), cartVo.getIsGift(),
-                cartVo.getIsPack(), cartVo.getUuid(), cartVo.getType(), cartVo.getTableId());
+                cartVo.getIsPack(), cartVo.getUuid(), cartVo.getType(), cartVo.getTableId(), cartVo.getIsPrint());
     }
 
     @PostMapping("/temporaryDishes")
@@ -53,6 +50,11 @@ public class OrderController {
         return Result.success(CodeEnum.SUCCESS, orderService.addTemporaryDishes(temporaryDishesDTO));
     }
 
+    @PutMapping("/updatePrice")
+    public Result updatePrice(@Valid @RequestBody UpdatePriceDTO updatePriceDTO) {
+        return Result.success(CodeEnum.SUCCESS, orderService.updatePrice(updatePriceDTO));
+    }
+
     @GetMapping("/queryCart")
     public Result queryCart(@RequestHeader("token") String token,
                             @RequestHeader("loginName") String loginName,
diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/entity/dto/UpdatePriceDTO.java b/src/main/java/com/chaozhanggui/system/cashierservice/entity/dto/UpdatePriceDTO.java
new file mode 100644
index 0000000..1d04620
--- /dev/null
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/entity/dto/UpdatePriceDTO.java
@@ -0,0 +1,21 @@
+package com.chaozhanggui.system.cashierservice.entity.dto;
+
+import lombok.Data;
+
+import javax.validation.constraints.DecimalMin;
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.NotNull;
+import java.math.BigDecimal;
+
+@Data
+public class UpdatePriceDTO {
+    @NotNull
+    private Integer shopId;
+    @NotNull
+    private Integer cartId;
+    @DecimalMin("0.01")
+    @NotNull
+    private BigDecimal amount;
+    @NotBlank(message = "折扣原因不能为空")
+    private String note;
+}
diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/entity/vo/CartVo.java b/src/main/java/com/chaozhanggui/system/cashierservice/entity/vo/CartVo.java
index 7fbc13f..99b11eb 100644
--- a/src/main/java/com/chaozhanggui/system/cashierservice/entity/vo/CartVo.java
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/entity/vo/CartVo.java
@@ -26,4 +26,5 @@ public class CartVo {
     private String masterId;
     private String tableId;
     private Integer orderId;
+    private Boolean isPrint;
 }
diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/service/MpOrderDetailService.java b/src/main/java/com/chaozhanggui/system/cashierservice/service/MpOrderDetailService.java
index beaaf0a..92bf032 100644
--- a/src/main/java/com/chaozhanggui/system/cashierservice/service/MpOrderDetailService.java
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/service/MpOrderDetailService.java
@@ -6,6 +6,7 @@ import com.chaozhanggui.system.cashierservice.entity.TbOrderDetail;
 import com.chaozhanggui.system.cashierservice.entity.TbShopPermission;
 import com.chaozhanggui.system.cashierservice.sign.Result;
 
+import java.math.BigDecimal;
 import java.util.List;
 
 /**
@@ -37,5 +38,12 @@ public interface MpOrderDetailService extends IService<TbOrderDetail> {
      * @param orderId 订单id
      */
     boolean removeByOrderId(Integer orderId);
+
+    /**
+     * 根据购物车id修改detail价格
+     * @param cartId 购物车id
+     * @param totalAmount 总价格
+     */
+    boolean updatePriceByCartId(Integer cartId, BigDecimal saleAmount, BigDecimal totalAmount);
 }
 
diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/service/MpOrderInfoService.java b/src/main/java/com/chaozhanggui/system/cashierservice/service/MpOrderInfoService.java
index fcebf1e..bc11665 100644
--- a/src/main/java/com/chaozhanggui/system/cashierservice/service/MpOrderInfoService.java
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/service/MpOrderInfoService.java
@@ -5,6 +5,7 @@ import com.chaozhanggui.system.cashierservice.bean.constant.TableConstant;
 import com.chaozhanggui.system.cashierservice.entity.TbOrderDetail;
 import com.chaozhanggui.system.cashierservice.entity.TbOrderInfo;
 
+import java.math.BigDecimal;
 import java.util.List;
 
 /**
@@ -23,5 +24,8 @@ public interface MpOrderInfoService extends IService<TbOrderInfo> {
      * @return 是否成功
      */
     boolean updateStateById(Integer shopId, Integer orderId, TableConstant.Status status);
+
+    boolean incrAmount(Integer orderId, BigDecimal subtract);
+
 }
 
diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/service/OrderService.java b/src/main/java/com/chaozhanggui/system/cashierservice/service/OrderService.java
index 1c856c9..38094f8 100644
--- a/src/main/java/com/chaozhanggui/system/cashierservice/service/OrderService.java
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/service/OrderService.java
@@ -209,7 +209,7 @@ public class OrderService {
 
     @Transactional(rollbackFor = Exception.class)
     public Result createCart(String masterId, Integer productId, Integer shopId, Integer skuId, BigDecimal number,
-                             String userId, String clientType, Integer cartId, String isGift, String isPack, String uuid, String type, String tableId) {
+                             String userId, String clientType, Integer cartId, String isGift, String isPack, String uuid, String type, String tableId, Boolean isPrint) {
         if (number == null) {
             return Result.fail(CodeEnum.PARAM);
         }
@@ -336,6 +336,7 @@ public class OrderService {
             cart.setTotalNumber(number);
             cart.resetTotalAmount();
             cart.setUuid(uuid);
+            cart.setIsPrint(isPrint);
             cashierCartMapper.updateByPrimaryKeySelective(cart);
         } else {
             List<TbCashierCart> list = cashierCartMapper.selectALlByMasterId(masterId, "create");
@@ -362,6 +363,7 @@ public class OrderService {
                     cashierCart.setMemberPrice(skuWithBLOBs.getMemberPrice());
                     cashierCart.setIsMember(0);
                 }
+                cashierCart.setIsPrint(isPrint);
                 cashierCart.setShopId(shopId.toString());
                 cashierCart.setTradeDay(DateUtils.getDay());
                 cashierCart.setStatus("create");
@@ -399,7 +401,7 @@ public class OrderService {
                 } else {
                     cashierCart.setNumber(number);
                 }
-
+                cashierCart.setIsPrint(isPrint);
                 cashierCart.resetTotalAmount();
                 mpCashierCartMapper.updateById(cashierCart);
             }
@@ -2092,4 +2094,36 @@ public class OrderService {
         }
         return tbCashierCart;
     }
+
+    public Object updatePrice(UpdatePriceDTO updatePriceDTO) {
+        TbCashierCart cashierCart = mpCashierCartService.selectByShopIdAndId(updatePriceDTO.getShopId(), updatePriceDTO.getCartId(), TableConstant.OrderInfo.Status.CREATE);
+        if (cashierCart == null) {
+            throw new MsgException("购物车商品不存在");
+        }
+
+        if (cashierCart.getIsMember() == 0) {
+            if (cashierCart.getSalePrice().subtract(updatePriceDTO.getAmount()).compareTo(BigDecimal.ZERO) < 0) {
+                throw new MsgException("折扣金额不能超过单价");
+            }
+        }else {
+            if (cashierCart.getMemberPrice().subtract(updatePriceDTO.getAmount()).compareTo(BigDecimal.ZERO) < 0) {
+                throw new MsgException("折扣金额不能超过单价");
+            }
+        }
+
+        BigDecimal oldAmount = cashierCart.getTotalAmount();
+        cashierCart.setDiscountSaleAmount(updatePriceDTO.getAmount());
+        cashierCart.resetTotalAmount();
+        cashierCart.setUpdatedAt(DateUtil.date().getTime());
+        cashierCart.setDiscountSaleNote(updatePriceDTO.getNote());
+        cashierCart.setDiscountSaleAmount(updatePriceDTO.getAmount());
+        mpCashierCartService.updateById(cashierCart);
+
+        // 更新订单和detail价格
+        if (cashierCart.getOrderId() != null) {
+            mpOrderDetailService.updatePriceByCartId(cashierCart.getId(), updatePriceDTO.getAmount(), cashierCart.getTotalAmount());
+            mpOrderInfoService.incrAmount(cashierCart.getOrderId(), cashierCart.getTotalAmount().subtract(oldAmount));
+        }
+        return cashierCart;
+    }
 }
diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/service/impl/MpOrderDetailServiceImpl.java b/src/main/java/com/chaozhanggui/system/cashierservice/service/impl/MpOrderDetailServiceImpl.java
index 37c82a0..6eef90b 100644
--- a/src/main/java/com/chaozhanggui/system/cashierservice/service/impl/MpOrderDetailServiceImpl.java
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/service/impl/MpOrderDetailServiceImpl.java
@@ -20,6 +20,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Primary;
 import org.springframework.stereotype.Service;
 
+import java.math.BigDecimal;
 import java.util.List;
 
 /**
@@ -50,5 +51,13 @@ public class MpOrderDetailServiceImpl extends ServiceImpl<MPOrderDetailMapper, T
         return remove(new LambdaQueryWrapper<TbOrderDetail>()
                 .eq(TbOrderDetail::getOrderId, orderId));
     }
+
+    @Override
+    public boolean updatePriceByCartId(Integer cartId, BigDecimal saleAmount, BigDecimal totalAmount) {
+        return update(new LambdaUpdateWrapper<TbOrderDetail>()
+                .eq(TbOrderDetail::getCartId, cartId)
+                .set(TbOrderDetail::getPrice, saleAmount)
+                .set(TbOrderDetail::getPriceAmount, totalAmount));
+    }
 }
 
diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/service/impl/MpOrderInfoServiceImpl.java b/src/main/java/com/chaozhanggui/system/cashierservice/service/impl/MpOrderInfoServiceImpl.java
index b743e44..9db8098 100644
--- a/src/main/java/com/chaozhanggui/system/cashierservice/service/impl/MpOrderInfoServiceImpl.java
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/service/impl/MpOrderInfoServiceImpl.java
@@ -1,6 +1,7 @@
 package com.chaozhanggui.system.cashierservice.service.impl;
 
 import cn.hutool.Hutool;
+import cn.hutool.core.util.StrUtil;
 import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.chaozhanggui.system.cashierservice.bean.constant.TableConstant;
@@ -12,6 +13,7 @@ import com.chaozhanggui.system.cashierservice.service.MpOrderDetailService;
 import com.chaozhanggui.system.cashierservice.service.MpOrderInfoService;
 import org.springframework.stereotype.Service;
 
+import java.math.BigDecimal;
 import java.util.List;
 
 /**
@@ -30,5 +32,18 @@ public class MpOrderInfoServiceImpl extends ServiceImpl<MPOrderInfoMapper, TbOrd
                 .eq(TbOrderInfo::getId, orderId)
                 .set(TbOrderInfo::getStatus, status.getValue()));
     }
+
+    @Override
+    public boolean incrAmount(Integer orderId, BigDecimal subtract) {
+        return update(new LambdaUpdateWrapper<TbOrderInfo>()
+                .eq(TbOrderInfo::getId, orderId)
+                .eq(TbOrderInfo::getStatus, TableConstant.OrderInfo.Status.UNPAID.getValue())
+                .apply(StrUtil.format("settlement_amount + {} >= 0", subtract))
+                .setSql(StrUtil.format("settlement_amount=settlement_amount+{}", subtract))
+                .setSql(StrUtil.format("order_amount=order_amount+{}", subtract))
+                .setSql(StrUtil.format("amount=amount+{}", subtract))
+                .setSql(StrUtil.format("origin_amount=origin_amount+{}", subtract))
+        );
+    }
 }