diff --git a/BBWYB.Server.API/Controllers/PurchaseOrderController.cs b/BBWYB.Server.API/Controllers/PurchaseOrderController.cs
index f1ab9e4..877a32b 100644
--- a/BBWYB.Server.API/Controllers/PurchaseOrderController.cs
+++ b/BBWYB.Server.API/Controllers/PurchaseOrderController.cs
@@ -91,6 +91,16 @@ namespace BBWYB.Server.API.Controllers
             purchaseOrderBusiness.SetHistoryPurchaseOrder(request);
         }
 
+        /// <summary>
+        /// 删除历史采购单
+        /// </summary>
+        /// <param name="request"></param>
+        [HttpDelete]
+        public void DeletePurchaseOrder([FromBody] DeletePurchaseOrderRequest request)
+        {
+            purchaseOrderBusiness.DeletePurchaseOrder(request);
+        }
+
         /// <summary>
         /// 手动签收采购单
         /// </summary>
diff --git a/BBWYB.Server.Business/PurchaseOrder/PurchaseOrderBusiness.cs b/BBWYB.Server.Business/PurchaseOrder/PurchaseOrderBusiness.cs
index 6bade0a..ceecd06 100644
--- a/BBWYB.Server.Business/PurchaseOrder/PurchaseOrderBusiness.cs
+++ b/BBWYB.Server.Business/PurchaseOrder/PurchaseOrderBusiness.cs
@@ -1127,6 +1127,12 @@ namespace BBWYB.Server.Business
         public void SetHistoryPurchaseOrder(SetHistoryPurchaseOrderRequest request)
         {
             nLogManager.Default().Info($"SetHistoryPurchaseOrder {JsonConvert.SerializeObject(request)}");
+
+            var orderPurchaseInfoList = fsql.Select<OrderPurchaseInfo>().Where(opi => opi.OrderId == request.OrderId && opi.IsEnabled == true).ToList();
+            var historyPurchaseOrder = orderPurchaseInfoList.FirstOrDefault(opi => opi.PurchaseOrderId == request.PurchaseOrderId);
+            if (historyPurchaseOrder == null)
+                throw new BusinessException("未查询到采购单");
+
             var dbOrderCostDetailList = fsql.Select<OrderCostDetail>().Where(ocd => ocd.OrderId == request.OrderId &&
                                                                                     ocd.PurchaseOrderId != request.PurchaseOrderId).ToList();
             var dbOrderCost = fsql.Select<OrderCost>(request.OrderId).ToOne();
@@ -1137,12 +1143,6 @@ namespace BBWYB.Server.Business
             var outPackAmount = dbOrderCostDetailList.Count() == 0 ? 0M : dbOrderCostDetailList.Sum(ocd => ocd.OutPackAmount) ?? 0M;
             dbOrderCost.CalculationOrderCostCostAndProfit(dbOrder.OrderTotalPrice.Value, purchaseProductAmount, purchaseFreight, outPackAmount, 0M);
 
-
-            var orderPurchaseInfoList = fsql.Select<OrderPurchaseInfo>().Where(opi => opi.OrderId == request.OrderId && opi.IsEnabled == true).ToList();
-            var historyPurchaseOrder = orderPurchaseInfoList.FirstOrDefault(opi => opi.PurchaseOrderId == request.PurchaseOrderId);
-            if (historyPurchaseOrder == null)
-                throw new BusinessException("未查询到采购单");
-
             #region 找出失效的快递单
             List<string> deleteWaybillNoList = new List<string>();
 
@@ -1161,7 +1161,6 @@ namespace BBWYB.Server.Business
             }
             #endregion
 
-
             orderPurchaseInfoList.Remove(historyPurchaseOrder);
             dbOrder.CalculationOrderState(fsql, out _, orderPurchaseInfoList: orderPurchaseInfoList);
 
@@ -1194,6 +1193,81 @@ namespace BBWYB.Server.Business
             });
         }
 
+        public void DeletePurchaseOrder(DeletePurchaseOrderRequest request)
+        {
+            nLogManager.Default().Info($"DeletePurchaseOrder {JsonConvert.SerializeObject(request)}");
+
+            //var po = fsql.Select<OrderPurchaseInfo>().Where(opi => opi.PurchaseOrderId == request.PurchaseOrderId).ToOne();
+            //if (po == null)
+            //    throw new BusinessException("采购单不不存在");
+            //var orderId = po.OrderId;
+
+            var orderPurchaseInfoList = fsql.Select<OrderPurchaseInfo>().Where(opi => opi.OrderId == request.OrderId).ToList();
+            var deletePurchaseOrder = orderPurchaseInfoList.FirstOrDefault(opi => opi.PurchaseOrderId == request.PurchaseOrderId);
+            if (deletePurchaseOrder == null)
+                throw new BusinessException("采购单不不存在");
+
+            var dbOrderCostDetailList = fsql.Select<OrderCostDetail>().Where(ocd => ocd.OrderId == request.OrderId &&
+                                                                                ocd.PurchaseOrderId != request.PurchaseOrderId).ToList();
+            var dbOrderCost = fsql.Select<OrderCost>(request.OrderId).ToOne();
+            var dbOrder = fsql.Select<Order>(request.OrderId).ToOne();
+
+            var purchaseProductAmount = dbOrderCostDetailList.Count() == 0 ? 0M : dbOrderCostDetailList.Sum(ocd => ocd.SkuAmount) ?? 0M;
+            var purchaseFreight = dbOrderCostDetailList.Count() == 0 ? 0M : dbOrderCostDetailList.Sum(ocd => ocd.PurchaseFreight) ?? 0M;
+            var outPackAmount = dbOrderCostDetailList.Count() == 0 ? 0M : dbOrderCostDetailList.Sum(ocd => ocd.OutPackAmount) ?? 0M;
+            dbOrderCost.CalculationOrderCostCostAndProfit(dbOrder.OrderTotalPrice.Value, purchaseProductAmount, purchaseFreight, outPackAmount, 0M);
+
+
+            #region 找出失效的快递单
+            List<string> deleteWaybillNoList = new List<string>();
+
+            //查询该采购单所使用的快递单号
+            var useWaybillNos = fsql.Select<ExpressOrderRelationInfo>().Where(eori => eori.PurchaseOrderId == request.PurchaseOrderId).ToList(eori => eori.WayBillNo);
+
+            //查询使用上述快递单号的快递单关系
+            var expressOrderRelationList = fsql.Select<ExpressOrderRelationInfo>().Where(eori => useWaybillNos.Contains(eori.WayBillNo)).ToList();
+
+            //以快递单号进行分组
+            var expressOrderRelationGroups = expressOrderRelationList.GroupBy(eori => eori.WayBillNo);
+            foreach (var group in expressOrderRelationGroups)
+            {
+                if (group.Count() == group.Count(eori => eori.PurchaseOrderId == request.PurchaseOrderId))
+                    deleteWaybillNoList.Add(group.Key);
+            }
+            #endregion
+
+            orderPurchaseInfoList.Remove(deletePurchaseOrder);
+            while (orderPurchaseInfoList.Any(opi => opi.IsEnabled == false))
+            {
+                var historyPo = orderPurchaseInfoList.FirstOrDefault(opi => opi.IsEnabled == false);
+                orderPurchaseInfoList.Remove(historyPo);
+            }
+            dbOrder.CalculationOrderState(fsql, out _, orderPurchaseInfoList: orderPurchaseInfoList);
+
+            fsql.Transaction(() =>
+            {
+                fsql.Delete<OrderPurchaseInfo>(deletePurchaseOrder.Id).ExecuteAffrows();
+
+                fsql.Update<OrderCostDetail>()
+                    .Set(ocd => ocd.IsEnabled, false)
+                    .Where(ocd => ocd.PurchaseOrderId == request.PurchaseOrderId)
+                    .ExecuteAffrows();
+
+                fsql.Delete<OrderPurchaseSkuInfo>().Where(opsi => opsi.PurchaseOrderId == request.PurchaseOrderId).ExecuteAffrows();
+                fsql.Delete<OrderPurchaseRelationInfo>().Where(opri => opri.PurchaseOrderId == request.PurchaseOrderId).ExecuteAffrows();
+
+                fsql.Delete<ExpressOrderRelationInfo>().Where(eori => eori.PurchaseOrderId == request.PurchaseOrderId).ExecuteAffrows();
+                if (deleteWaybillNoList.Count() > 0)
+                    fsql.Delete<PurchaseExpressOrder>(deleteWaybillNoList).ExecuteAffrows();
+
+                fsql.Delete<InStorePurchaseOrdeRrelationInfo>().Where(i => i.OrderId == request.OrderId && i.PurchaseOrderId == request.PurchaseOrderId)
+                                                               .ExecuteAffrows();
+
+                fsql.Update<OrderCost>().SetSource(dbOrderCost).ExecuteAffrows();
+                fsql.Update<Order>(dbOrder.Id).Set(o => o.OrderState, dbOrder.OrderState).ExecuteAffrows();
+            });
+        }
+
         /// <summary>
         /// 修改采购快递单
         /// </summary>
diff --git a/BBWYB.Server.Model/Dto/Request/PurchaseOrder/DeletePurchaseOrderRequest.cs b/BBWYB.Server.Model/Dto/Request/PurchaseOrder/DeletePurchaseOrderRequest.cs
new file mode 100644
index 0000000..81fa3ad
--- /dev/null
+++ b/BBWYB.Server.Model/Dto/Request/PurchaseOrder/DeletePurchaseOrderRequest.cs
@@ -0,0 +1,6 @@
+namespace BBWYB.Server.Model.Dto
+{
+    public class DeletePurchaseOrderRequest : SetHistoryPurchaseOrderRequest
+    {
+    }
+}