diff --git a/internal/biz/mixrepos/cmb.go b/internal/biz/mixrepos/cmb.go
new file mode 100644
index 0000000..330d444
--- /dev/null
+++ b/internal/biz/mixrepos/cmb.go
@@ -0,0 +1,10 @@
+package mixrepos
+
+import (
+	"context"
+	v1 "voucher/api/v1"
+)
+
+type CmbMixRepo interface {
+	BuildRequest(ctx context.Context, bizJsonStr string) (*v1.CmbRequest, error)
+}
diff --git a/internal/data/mixrepoimpl/cmb.go b/internal/data/mixrepoimpl/cmb.go
new file mode 100644
index 0000000..52d15a7
--- /dev/null
+++ b/internal/data/mixrepoimpl/cmb.go
@@ -0,0 +1,66 @@
+package mixrepoimpl
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+	v1 "voucher/api/v1"
+	"voucher/internal/biz/mixrepos"
+	"voucher/internal/conf"
+	"voucher/internal/pkg/cmb"
+	"voucher/internal/pkg/helper"
+)
+
+type CmbMixRepoImpl struct {
+	bc *conf.Bootstrap
+}
+
+func NewCmbMixRepoImpl(bc *conf.Bootstrap) mixrepos.CmbMixRepo {
+	return &CmbMixRepoImpl{bc: bc}
+}
+
+func (s *CmbMixRepoImpl) BuildRequest(_ context.Context, bizJsonStr string) (*v1.CmbRequest, error) {
+	// 我们的sm2 公钥加密
+	// 请求到我们这边 使用 我们的私钥解密
+	encryptBody, err := cmb.Encrypt(s.bc.Cmb.Sm2Puk, bizJsonStr)
+	if err != nil {
+		return nil, err
+	}
+
+	date := time.Now().Format("20060102150405")
+
+	reply := &v1.CmbRequest{
+		Mid:         s.bc.Cmb.Mid,
+		Aid:         s.bc.Cmb.Aid,
+		Date:        date,
+		Random:      string(cmb.RandomBytes(16)),
+		KeyAlias:    s.bc.Cmb.KeyAlias,
+		CmbKeyAlias: s.bc.Cmb.CmbKeyAlias,
+		EncryptBody: encryptBody,
+		Sign:        "",
+	}
+
+	kvRows := helper.SortStructFieldsByKey(reply)
+
+	var strToBeSigned strings.Builder
+	for _, kv := range kvRows {
+		if kv.Key == "sign" {
+			continue
+		}
+		if kv.Value == "" {
+			continue
+		}
+		strToBeSigned.WriteString(fmt.Sprintf("%s=%s&", kv.Key, kv.Value))
+	}
+
+	str := fmt.Sprintf("/voucher/cmb/v1/order?%s", strings.TrimRight(strToBeSigned.String(), "&"))
+
+	sing, err := cmb.Sign(s.bc.Cmb.CmbSm2Pik, str)
+	if err != nil {
+		return nil, err
+	}
+	reply.Sign = sing
+
+	return reply, nil
+}
diff --git a/internal/data/mixrepoimpl/provider_set.go b/internal/data/mixrepoimpl/provider_set.go
index 15bb377..6c9900f 100644
--- a/internal/data/mixrepoimpl/provider_set.go
+++ b/internal/data/mixrepoimpl/provider_set.go
@@ -8,4 +8,5 @@ import (
 var ProviderMixRepoImplSet = wire.NewSet(
 	NewGenerateMixRepoImpl,
 	NewMQSendMixRepoImpl,
+	NewCmbMixRepoImpl,
 )
diff --git a/internal/service/cmb_mock.go b/internal/service/cmb_mock.go
index 0690815..a9a589f 100644
--- a/internal/service/cmb_mock.go
+++ b/internal/service/cmb_mock.go
@@ -2,13 +2,8 @@ package service
 
 import (
 	"encoding/json"
-	"fmt"
 	"github.com/go-kratos/kratos/v2/transport/http"
-	"strings"
-	"time"
 	v1 "voucher/api/v1"
-	"voucher/internal/pkg/cmb"
-	"voucher/internal/pkg/helper"
 )
 
 func (s *VoucherService) CmbOrderMock(ctx http.Context) error {
@@ -25,47 +20,11 @@ func (s *VoucherService) CmbOrderMock(ctx http.Context) error {
 
 	bizJsonStr := string(bizJsonBytes)
 
-	// 我们的sm2 公钥加密
-	// 请求到我们这边 使用 我们的私钥解密
-	encryptBody, err := cmb.Encrypt(s.bc.Cmb.Sm2Puk, bizJsonStr)
+	reply, err := s.CmbMixRepo.BuildRequest(ctx, bizJsonStr)
 	if err != nil {
 		return err
 	}
 
-	date := time.Now().Format("20060102150405")
-
-	reply := &v1.CmbRequest{
-		Mid:         s.bc.Cmb.Mid,
-		Aid:         s.bc.Cmb.Aid,
-		Date:        date,
-		Random:      string(cmb.RandomBytes(16)),
-		KeyAlias:    s.bc.Cmb.KeyAlias,
-		CmbKeyAlias: s.bc.Cmb.CmbKeyAlias,
-		EncryptBody: encryptBody,
-		Sign:        "",
-	}
-
-	kvRows := helper.SortStructFieldsByKey(reply)
-
-	var strToBeSigned strings.Builder
-	for _, kv := range kvRows {
-		if kv.Key == "sign" {
-			continue
-		}
-		if kv.Value == "" {
-			continue
-		}
-		strToBeSigned.WriteString(fmt.Sprintf("%s=%s&", kv.Key, kv.Value))
-	}
-
-	str := fmt.Sprintf("/voucher/cmb/v1/order?%s", strings.TrimRight(strToBeSigned.String(), "&"))
-
-	sing, err := cmb.Sign(s.bc.Cmb.CmbSm2Pik, str)
-	if err != nil {
-		return err
-	}
-	reply.Sign = sing
-
 	return ctx.JSON(200, reply)
 }
 
diff --git a/internal/service/voucher.go b/internal/service/voucher.go
index cf0bcc2..cb763cb 100644
--- a/internal/service/voucher.go
+++ b/internal/service/voucher.go
@@ -2,20 +2,24 @@ package service
 
 import (
 	"voucher/internal/biz"
+	"voucher/internal/biz/mixrepos"
 	"voucher/internal/conf"
 )
 
 type VoucherService struct {
 	bc         *conf.Bootstrap
 	VoucherBiz *biz.VoucherBiz
+	CmbMixRepo mixrepos.CmbMixRepo
 }
 
 func NewVoucherService(
 	bc *conf.Bootstrap,
 	VoucherBiz *biz.VoucherBiz,
+	CmbMixRepo mixrepos.CmbMixRepo,
 ) *VoucherService {
 	return &VoucherService{
 		bc:         bc,
 		VoucherBiz: VoucherBiz,
+		CmbMixRepo: CmbMixRepo,
 	}
 }