diff --git a/ik3cloud/constant/constant.go b/ik3cloud/constant/constant.go
index dbe6a08..1512dfb 100644
--- a/ik3cloud/constant/constant.go
+++ b/ik3cloud/constant/constant.go
@@ -19,6 +19,7 @@ const (
 	ActionRecPayPurpose Action = "CN_RECPAYPURPOSE"         // 收付款用途
 	ActionExpense       Action = "BD_Expense"               // 费用项目
 	ActionPayment       Action = "AP_PAYBILL"               // 付款单
+	ActionPaymentRefund Action = "AP_REFUNDBILL"            // 付款退款单
 	ActionInformation   Action = "BOS_ASSISTANTDATA_DETAIL" // 辅助资料
 	ActionReceiptAction Action = "AR_RECEIVEBILL"           // 收款单
 	ActionBankAccount   Action = "CN_BANKACNT"              // 银行账户
@@ -42,6 +43,7 @@ var ActionIdField = map[Action]string{
 	ActionRecPayPurpose: "",
 	ActionExpense:       "",
 	ActionPayment:       "FID",
+	ActionPaymentRefund: "FID",
 	ActionInformation:   "FEntryID",
 	ActionReceiptAction: "FID",
 }
@@ -62,6 +64,7 @@ var ActionNumberField = map[Action]string{
 	ActionRecPayPurpose: "FNumber",
 	ActionExpense:       "FNumber",
 	ActionPayment:       "FBillNo",
+	ActionPaymentRefund: "FBillNo",
 	ActionInformation:   "FNumber",
 	ActionReceiptAction: "FBillNo",
 }
@@ -97,6 +100,12 @@ const (
 	ReceiptTypeReceipt   ReceiptType = "SKDLX09_SYS" // 收款单
 )
 
+type PaymentRefundType = string
+
+const (
+	PaymentRefundTypePurchase PaymentRefundType = "FKTKDLX01_SYS" // 采购业务退款单
+)
+
 type InformationType = string
 
 const (
diff --git a/ik3cloud/ik3cloud.go b/ik3cloud/ik3cloud.go
index f9bc470..609cbe4 100644
--- a/ik3cloud/ik3cloud.go
+++ b/ik3cloud/ik3cloud.go
@@ -7,19 +7,20 @@ import (
 )
 
 type Ik3cloud struct {
-	Department  department  // 部门
-	Staff       staff       // 员工
-	Position    position    // 职位
-	Contact     contact     // 联系人
-	Factory     factory     // 工厂
-	Custom      custom      // 客户
-	Product     product     // 产品
-	Receivable  receivable  // 应收
-	Payable     payable     // 应付
-	Dict        dict        // 字典
-	Payment     payment     // 付款单
-	Information information // 资料
-	Receipt     receipt     // 收款单
+	Department    department    // 部门
+	Staff         staff         // 员工
+	Position      position      // 职位
+	Contact       contact       // 联系人
+	Factory       factory       // 工厂
+	Custom        custom        // 客户
+	Product       product       // 产品
+	Receivable    receivable    // 应收
+	Payable       payable       // 应付
+	Dict          dict          // 字典
+	Payment       payment       // 付款单
+	Information   information   // 资料
+	Receipt       receipt       // 收款单
+	PaymentRefund paymentRefund // 付款退款单
 }
 
 type Entity struct {
diff --git a/ik3cloud/paymentRefund.go b/ik3cloud/paymentRefund.go
new file mode 100644
index 0000000..0cdac57
--- /dev/null
+++ b/ik3cloud/paymentRefund.go
@@ -0,0 +1,53 @@
+package ik3cloud
+
+import (
+	"context"
+	"time"
+
+	"git.kumo.work/shama/service/client"
+	"git.kumo.work/shama/service/ik3cloud/constant"
+	"github.com/shopspring/decimal"
+)
+
+type paymentRefund struct {
+}
+
+type ArgsPaymentRefundSave struct {
+	PaymentRefundId int64                      // 付款退款单id
+	Number          string                     // 付款退款单编号
+	RefundType      constant.PaymentRefundType // 付款退款单类型
+	PayUnitType     string                     // 付款单位类型
+	PayUnit         string                     // 付款单位(退款供应商)
+	CurrencyNumber  string                     // 币种
+	Rate            decimal.Decimal            // 汇率
+	Date            time.Time                  // 业务日期 2006-01-02 15:04:05
+	Remarks         string                     // 备注
+	Costs           []PaymentRefundCostItem    // 费用
+}
+
+type PaymentRefundCostItem struct {
+	PaymentPurpose string          // 原付款用途
+	Amount         decimal.Decimal // 金额
+	BankAccount    string          // 我方银行账号
+	InvoiceSerial  string          // 发票号
+}
+
+// Save @TITLE 保存付款退款单
+func (p *paymentRefund) Save(ctx context.Context, args ArgsPaymentRefundSave) (entity Entity, err error) {
+	xClient, err := client.GetClient(p)
+	if err != nil {
+		return
+	}
+	err = xClient.Call(ctx, "Save", args, &entity)
+	return
+}
+
+// Cancel @TITLE 作废
+func (p *paymentRefund) Cancel(ctx context.Context, args Unique) (err error) {
+	xClient, err := client.GetClient(p)
+	if err != nil {
+		return
+	}
+	reply := 0
+	return xClient.Call(ctx, "Cancel", args, &reply)
+}