diff --git a/order/src/main/java/com/order/controller/OrderAfterSalesApplyController.java b/order/src/main/java/com/order/controller/OrderAfterSalesApplyController.java
index c64d1b3..eeada36 100644
--- a/order/src/main/java/com/order/controller/OrderAfterSalesApplyController.java
+++ b/order/src/main/java/com/order/controller/OrderAfterSalesApplyController.java
@@ -30,6 +30,7 @@ import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.*;
 
 import javax.annotation.Resource;
+import java.math.BigDecimal;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -52,6 +53,40 @@ public class OrderAfterSalesApplyController {
     @Resource
     private BsOrderChildService orderChildService;
 
+    @RequestMapping(value="/calculate",method = RequestMethod.GET)
+    @ResponseBody
+    @ApiOperation(value = "计算预计退款金额")
+    public ResponseData calculate(@RequestParam(value = "childOrderNo" , required = true) String childOrderNo,
+                                  @RequestParam(value = "productCount" , required = true) Integer productCount) {
+        try {
+            // 查询子订单
+            OrderChildModel orderChild = orderChildService.getDetail(childOrderNo);
+            if (orderChild == null) {
+                throw ErrorHelp.genException(SysCode.System, ErrorCode.COMMON_ERROR, "未知的商品订单");
+            }
+            Map<String,Object> param = new HashMap<>();
+            if (orderChild.getSurplusRefundCount().equals(productCount)) {
+                // 全部退款
+                param.put("refundPrice", orderChild.getSurplusRefundPrice());
+                param.put("refundIntegral", orderChild.getSurplusRefundIntegral());
+            } else {
+                // 部分退款
+                // 计算单价
+                BigDecimal unitPrice = orderChild.getSurplusRefundPrice().divide(new BigDecimal(productCount.toString()), 2, BigDecimal.ROUND_DOWN).setScale(2);
+                BigDecimal unitPriceIntegral = new BigDecimal(orderChild.getSurplusRefundIntegral().toString()).divide(new BigDecimal("100"))
+                        .divide(new BigDecimal(productCount.toString()), 2, BigDecimal.ROUND_DOWN).setScale(2);
+                param.put("refundPrice", unitPrice.multiply(new BigDecimal(productCount.toString())));
+                param.put("refundIntegral", unitPriceIntegral.multiply(new BigDecimal("100")).longValue());
+            }
+            return ResponseMsgUtil.success(param);
+
+        } catch (Exception e) {
+            log.error("error!",e);
+            return ResponseMsgUtil.exception(e);
+        }
+    }
+
+
     @RequestMapping(value="/apply",method = RequestMethod.POST)
     @ResponseBody
     @ApiOperation(value = "申请")