diff --git a/cos.go b/cos.go
index c740648..422a7fe 100644
--- a/cos.go
+++ b/cos.go
@@ -22,7 +22,7 @@ import (
 
 const (
 	// Version current go sdk version
-	Version               = "0.7.20"
+	Version               = "0.7.21"
 	userAgent             = "cos-go-sdk-v5/" + Version
 	contentTypeXML        = "application/xml"
 	defaultServiceBaseURL = "http://service.cos.myqcloud.com"
diff --git a/example/object/upload.go b/example/object/upload.go
index 54a6f7d..81c2e64 100644
--- a/example/object/upload.go
+++ b/example/object/upload.go
@@ -51,7 +51,8 @@ func main() {
 
 	// Case1 多线程上传对象
 	opt := &cos.MultiUploadOptions{
-		ThreadPoolSize: 3,
+		EnableVerification: true,
+		ThreadPoolSize:     5,
 	}
 	v, _, err := c.Object.Upload(
 		context.Background(), "gomulput1G", "./test1G", opt,
@@ -71,4 +72,5 @@ func main() {
 	)
 	log_status(err)
 	fmt.Printf("Case2 done, %v\n", v)
+
 }
diff --git a/helper.go b/helper.go
index 05d8e2b..bccacb8 100644
--- a/helper.go
+++ b/helper.go
@@ -6,6 +6,7 @@ import (
 	"crypto/sha1"
 	"errors"
 	"fmt"
+	"hash/crc64"
 	"io"
 	"net/http"
 	"net/url"
@@ -33,6 +34,17 @@ func calSHA1Digest(msg []byte) []byte {
 	return m.Sum(nil)
 }
 
+func calCRC64(fd io.Reader) (uint64, error) {
+	tb := crc64.MakeTable(crc64.ECMA)
+	hash := crc64.New(tb)
+	_, err := io.Copy(hash, fd)
+	if err != nil {
+		return 0, err
+	}
+	sum := hash.Sum64()
+	return sum, nil
+}
+
 // cloneRequest returns a clone of the provided *http.Request. The clone is a
 // shallow copy of the struct and its Header map.
 func cloneRequest(r *http.Request) *http.Request {
diff --git a/object.go b/object.go
index 673e1c0..585b554 100644
--- a/object.go
+++ b/object.go
@@ -524,10 +524,11 @@ type Object struct {
 // MultiUploadOptions is the option of the multiupload,
 // ThreadPoolSize default is one
 type MultiUploadOptions struct {
-	OptIni         *InitiateMultipartUploadOptions
-	PartSize       int64
-	ThreadPoolSize int
-	CheckPoint     bool
+	OptIni             *InitiateMultipartUploadOptions
+	PartSize           int64
+	ThreadPoolSize     int
+	CheckPoint         bool
+	EnableVerification bool
 }
 
 type Chunk struct {
@@ -738,11 +739,21 @@ func (s *ObjectService) Upload(ctx context.Context, name string, filepath string
 	if opt == nil {
 		opt = &MultiUploadOptions{}
 	}
+	var localcrc uint64
 	// 1.Get the file chunk
 	totalBytes, chunks, partNum, err := SplitFileIntoChunks(filepath, opt.PartSize)
 	if err != nil {
 		return nil, nil, err
 	}
+	// 校验
+	if opt.EnableVerification {
+		fd, err := os.Open(filepath)
+		if err != nil {
+			return nil, nil, err
+		}
+		defer fd.Close()
+		localcrc, err = calCRC64(fd)
+	}
 	// filesize=0 , use simple upload
 	if partNum == 0 {
 		var opt0 *ObjectPutOptions
@@ -881,8 +892,16 @@ func (s *ObjectService) Upload(ctx context.Context, name string, filepath string
 	v, resp, err := s.CompleteMultipartUpload(context.Background(), name, uploadID, optcom)
 	if err != nil {
 		s.AbortMultipartUpload(ctx, name, uploadID)
+		return v, resp, err
 	}
 
+	if resp != nil && opt.EnableVerification {
+		scoscrc := resp.Header.Get("x-cos-hash-crc64ecma")
+		icoscrc, _ := strconv.ParseUint(scoscrc, 10, 64)
+		if icoscrc != localcrc {
+			return v, resp, fmt.Errorf("verification failed, want:%v, return:%v", localcrc, icoscrc)
+		}
+	}
 	return v, resp, err
 }