diff --git a/consts/url.go b/consts/url.go
index af4cd4c..a917ef2 100644
--- a/consts/url.go
+++ b/consts/url.go
@@ -25,6 +25,7 @@ const (
 	// LKL_ACCOUNT_WITHDRAW_URL 拉卡拉账户提现
 	LKL_ACCOUNT_WITHDRAW_URL          = "/v2/laep/industry/ewalletWithdrawD1"
 	LKL_SPLIT_LEDGER_RESULT_QUERY_URL = "/v3/sacs/query_plus"
+	LKL_SPLIT_LEDGER_FALLBACK_URL     = "/v3/sacs/fallback"
 )
 
 const (
diff --git a/lklsdk/sdk.go b/lklsdk/sdk.go
index 397ac29..8d4bb95 100644
--- a/lklsdk/sdk.go
+++ b/lklsdk/sdk.go
@@ -158,6 +158,11 @@ func (s *SDK[T]) OrderSplitLedgerResultQuery(req *model.OrderSplitLedgerResultQu
 	return s.SplitLedger.OrderSplitLedgerResultQuery(req)
 }
 
+// OrderSplitLedgerFallback 订单分账回退
+func (s *SDK[T]) OrderSplitLedgerFallback(req *model.OrderSplitLedgerFallbackReqData) (*T, error) {
+	return s.SplitLedger.OrderSplitLedgerFallback(req)
+}
+
 // TradeQuery 交易查询
 func (s *SDK[T]) TradeQuery(req *model.TradeQueryReqData) (*T, error) {
 	return s.Trade.TradeQuery(req)
diff --git a/lklsdk/split_ledger_more.go b/lklsdk/split_ledger_more.go
index 70ad5e2..b6889b8 100644
--- a/lklsdk/split_ledger_more.go
+++ b/lklsdk/split_ledger_more.go
@@ -156,3 +156,22 @@ func (s *SplitLedgerService[T]) OrderSplitLedgerResultQuery(req *model.OrderSpli
 	}
 	return respBody, nil
 }
+
+func (s *SplitLedgerService[T]) OrderSplitLedgerFallback(req *model.OrderSplitLedgerFallbackReqData) (*T, error) {
+	// 构建请求参数
+	url := consts.BASE_URL + consts.LKL_SPLIT_LEDGER_FALLBACK_URL
+
+	// 构建BaseModel请求
+	baseReq := model.OrderSplitLedgerFallbackRequest{
+		ReqTime: time.Now().Format("20060102150405"),
+		Version: "3.0",
+		ReqData: req,
+	}
+
+	// 发送请求
+	respBody, err := s.client.DoRequest(url, baseReq)
+	if err != nil {
+		return nil, err
+	}
+	return respBody, nil
+}
diff --git a/model/orderSplitLedgerFallback.go b/model/orderSplitLedgerFallback.go
new file mode 100644
index 0000000..2072eeb
--- /dev/null
+++ b/model/orderSplitLedgerFallback.go
@@ -0,0 +1,40 @@
+package model
+
+type OrderSplitLedgerFallbackRequest struct {
+	ReqData *OrderSplitLedgerFallbackReqData `json:"req_data"` // 请求业务数据
+	Version string                           `json:"version"`  // 接口版本号
+	ReqTime string                           `json:"req_time"` // 请求时间，格式为yyyyMMddHHmmss
+}
+
+type OrderSplitLedgerFallbackReqData struct {
+	MerchantNo          string                             `json:"merchant_no"`            // 商户号，必传，长度32
+	OriginSeparateNo    string                             `json:"origin_separate_no"`     // 原分账单号，必传，长度32
+	OutSeparateNo       string                             `json:"out_separate_no"`        // 外部分账单号，必传，长度32
+	OriginOutSeparateNo string                             `json:"origin_out_separate_no"` // 原外部分账单号，必传，长度32
+	FallbackReason      string                             `json:"fallback_reason"`        // 回退原因，必传，长度255
+	TotalAmt            string                             `json:"total_amt"`              // 总金额，必传，长度15
+	OriginRecvDatas     []*OrderSplitLedgerOriginRecvDatas `json:"origin_recv_datas"`      // 原分账接收数据，必传，数组长度1-100
+}
+
+type OrderSplitLedgerOriginRecvDatas struct {
+	RecvNo string `json:"recv_no"` // 原分账接收号，必传，长度32
+	Amt    string `json:"amt"`     // 原分账接收金额，必传，长度15
+}
+
+type OrderSplitLedgerFallbackResponse struct {
+	Msg      string `json:"msg"`       // 消息
+	RespTime string `json:"resp_time"` // 响应时间
+	Code     string `json:"code"`      // 响应码 SACS0000表示成功
+	RespData struct {
+		OutSeparateNo       string `json:"out_separate_no"`        // 外部分账单号，必传，长度32
+		TotalAmt            string `json:"total_amt"`              // 总金额，必传，长度15
+		OriginOutSeparateNo string `json:"origin_out_separate_no"` // 原外部分账单号，必传，长度32
+		OriginSeparateNo    string `json:"origin_separate_no"`     // 原分账单号，必传，长度32
+		Status              string `json:"status"`                 // 状态，必传，长度1
+		SeparateNo          string `json:"separate_no"`            // 分账单号，必传，长度32
+	}
+}
+
+func (s *OrderSplitLedgerFallbackResponse) SuccessOrFail() bool {
+	return s.Code == "SACS0000"
+}