diff --git a/cos.go b/cos.go
index 616f2bf..2f5dacf 100644
--- a/cos.go
+++ b/cos.go
@@ -22,7 +22,7 @@ import (
 
 const (
 	// Version current go sdk version
-	Version               = "0.7.16"
+	Version               = "0.7.17"
 	userAgent             = "cos-go-sdk-v5/" + Version
 	contentTypeXML        = "application/xml"
 	defaultServiceBaseURL = "http://service.cos.myqcloud.com"
diff --git a/example/object/multicopy.go b/example/object/multicopy.go
new file mode 100644
index 0000000..3c26ccc
--- /dev/null
+++ b/example/object/multicopy.go
@@ -0,0 +1,66 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"fmt"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func log_status(err error) {
+	if err == nil {
+		return
+	}
+	if cos.IsNotFoundError(err) {
+		// WARN
+		fmt.Println("WARN: Resource is not existed")
+	} else if e, ok := cos.IsCOSError(err); ok {
+		fmt.Printf("ERROR: Code: %v\n", e.Code)
+		fmt.Printf("ERROR: Message: %v\n", e.Message)
+		fmt.Printf("ERROR: Resource: %v\n", e.Resource)
+		fmt.Printf("ERROR: RequestId: %v\n", e.RequestID)
+		// ERROR
+	} else {
+		fmt.Printf("ERROR: %v\n", err)
+		// ERROR
+	}
+}
+
+func main() {
+	u, _ := url.Parse("https://test-1259654469.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	opt := &cos.MultiCopyOptions{
+		OptCopy: &cos.ObjectCopyOptions{
+			&cos.ObjectCopyHeaderOptions{
+				XCosStorageClass: "Archive",
+			},
+			nil,
+		},
+		ThreadPoolSize: 10,
+	}
+	source := "exampleobject"
+	soruceURL := fmt.Sprintf("%s/%s", u.Host, source)
+	dest := fmt.Sprintf("destobject")
+	res, _, err := c.Object.MultiCopy(context.Background(), dest, soruceURL, opt)
+	log_status(err)
+	fmt.Printf("res:%+v\n", res)
+}
diff --git a/helper.go b/helper.go
index c178016..5aef708 100644
--- a/helper.go
+++ b/helper.go
@@ -152,3 +152,33 @@ func CheckReaderLen(reader io.Reader) error {
 	}
 	return errors.New("The single object size you upload can not be larger than 5GB")
 }
+
+func CopyOptionsToMulti(opt *ObjectCopyOptions) *InitiateMultipartUploadOptions {
+	if opt == nil {
+		return nil
+	}
+	optini := &InitiateMultipartUploadOptions{
+		opt.ACLHeaderOptions,
+		&ObjectPutHeaderOptions{},
+	}
+	if opt.ObjectCopyHeaderOptions == nil {
+		return optini
+	}
+	optini.ObjectPutHeaderOptions = &ObjectPutHeaderOptions{
+		CacheControl:             opt.ObjectCopyHeaderOptions.CacheControl,
+		ContentDisposition:       opt.ObjectCopyHeaderOptions.ContentDisposition,
+		ContentEncoding:          opt.ObjectCopyHeaderOptions.ContentEncoding,
+		ContentType:              opt.ObjectCopyHeaderOptions.ContentType,
+		ContentLanguage:          opt.ObjectCopyHeaderOptions.ContentLanguage,
+		Expect:                   opt.ObjectCopyHeaderOptions.Expect,
+		Expires:                  opt.ObjectCopyHeaderOptions.Expires,
+		XCosMetaXXX:              opt.ObjectCopyHeaderOptions.XCosMetaXXX,
+		XCosStorageClass:         opt.ObjectCopyHeaderOptions.XCosStorageClass,
+		XCosServerSideEncryption: opt.ObjectCopyHeaderOptions.XCosServerSideEncryption,
+		XCosSSECustomerAglo:      opt.ObjectCopyHeaderOptions.XCosSSECustomerAglo,
+		XCosSSECustomerKey:       opt.ObjectCopyHeaderOptions.XCosSSECustomerKey,
+		XCosSSECustomerKeyMD5:    opt.ObjectCopyHeaderOptions.XCosSSECustomerKeyMD5,
+		XOptionHeader:            opt.ObjectCopyHeaderOptions.XOptionHeader,
+	}
+	return optini
+}
diff --git a/object.go b/object.go
index de7733e..71b60af 100644
--- a/object.go
+++ b/object.go
@@ -258,6 +258,8 @@ type ObjectCopyResult struct {
 	XMLName      xml.Name `xml:"CopyObjectResult"`
 	ETag         string   `xml:"ETag,omitempty"`
 	LastModified string   `xml:"LastModified,omitempty"`
+	CRC64        string   `xml:"CRC64,omitempty"`
+	VersionId    string   `xml:"VersionId,omitempty"`
 }
 
 // Copy 调用 PutObjectCopy 请求实现将一个文件从源路径复制到目标路径。建议文件大小 1M 到 5G，
@@ -588,8 +590,8 @@ func worker(s *ObjectService, jobs <-chan *Jobs, results chan<- *Results) {
 	}
 }
 
-func DividePart(fileSize int64) (int64, int64) {
-	partSize := int64(1 * 1024 * 1024)
+func DividePart(fileSize int64, last int) (int64, int64) {
+	partSize := int64(last * 1024 * 1024)
 	partNum := fileSize / partSize
 	for partNum >= 10000 {
 		partSize = partSize * 2
@@ -621,7 +623,7 @@ func SplitFileIntoChunks(filePath string, partSize int64) (int64, []Chunk, int,
 			return 0, nil, 0, errors.New("Too many parts, out of 10000")
 		}
 	} else {
-		partNum, partSize = DividePart(stat.Size())
+		partNum, partSize = DividePart(stat.Size(), 1)
 	}
 
 	var chunks []Chunk
@@ -866,6 +868,9 @@ func (s *ObjectService) Upload(ctx context.Context, name string, filepath string
 	progressCallback(listener, event)
 
 	v, resp, err := s.CompleteMultipartUpload(context.Background(), name, uploadID, optcom)
+	if err != nil {
+		s.AbortMultipartUpload(ctx, name, uploadID)
+	}
 
 	return v, resp, err
 }
diff --git a/object_part.go b/object_part.go
index 1752e02..bdae188 100644
--- a/object_part.go
+++ b/object_part.go
@@ -7,6 +7,9 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"net/url"
+	"sort"
+	"strings"
 )
 
 // InitiateMultipartUploadOptions is the option of InitateMultipartUpload
@@ -307,3 +310,206 @@ func (s *ObjectService) ListUploads(ctx context.Context, opt *ObjectListUploadsO
 	resp, err := s.client.send(ctx, sendOpt)
 	return &res, resp, err
 }
+
+type MultiCopyOptions struct {
+	OptCopy        *ObjectCopyOptions
+	PartSize       int64
+	ThreadPoolSize int
+}
+
+type CopyJobs struct {
+	Name       string
+	UploadId   string
+	RetryTimes int
+	Chunk      Chunk
+	Opt        *ObjectCopyPartOptions
+}
+
+type CopyResults struct {
+	PartNumber int
+	Resp       *Response
+	err        error
+	res        *CopyPartResult
+}
+
+func copyworker(s *ObjectService, jobs <-chan *CopyJobs, results chan<- *CopyResults) {
+	for j := range jobs {
+		var copyres CopyResults
+		j.Opt.XCosCopySourceRange = fmt.Sprintf("bytes=%d-%d", j.Chunk.OffSet, j.Chunk.OffSet+j.Chunk.Size-1)
+		rt := j.RetryTimes
+		for {
+			res, resp, err := s.CopyPart(context.Background(), j.Name, j.UploadId, j.Chunk.Number, j.Opt.XCosCopySource, j.Opt)
+			copyres.PartNumber = j.Chunk.Number
+			copyres.Resp = resp
+			copyres.err = err
+			copyres.res = res
+			if err != nil {
+				rt--
+				if rt == 0 {
+					results <- &copyres
+					break
+				}
+				continue
+			}
+			results <- &copyres
+			break
+		}
+	}
+}
+
+func (s *ObjectService) innerHead(ctx context.Context, sourceURL string, opt *ObjectHeadOptions, id []string) (resp *Response, err error) {
+	surl := strings.SplitN(sourceURL, "/", 2)
+	if len(surl) < 2 {
+		err = errors.New(fmt.Sprintf("sourceURL format error: %s", sourceURL))
+		return
+	}
+
+	u, err := url.Parse(fmt.Sprintf("https://%s", surl[0]))
+	if err != nil {
+		return
+	}
+	b := &BaseURL{BucketURL: u}
+	client := NewClient(b, &http.Client{
+		Transport: s.client.client.Transport,
+	})
+	if len(id) > 0 {
+		resp, err = client.Object.Head(ctx, surl[1], nil, id[0])
+	} else {
+		resp, err = client.Object.Head(ctx, surl[1], nil)
+	}
+	return
+}
+
+func SplitCopyFileIntoChunks(totalBytes int64, partSize int64) ([]Chunk, int, error) {
+	var partNum int64
+	if partSize > 0 {
+		partSize = partSize * 1024 * 1024
+		partNum = totalBytes / partSize
+		if partNum >= 10000 {
+			return nil, 0, errors.New("Too many parts, out of 10000")
+		}
+	} else {
+		partNum, partSize = DividePart(totalBytes, 64)
+	}
+
+	var chunks []Chunk
+	var chunk = Chunk{}
+	for i := int64(0); i < partNum; i++ {
+		chunk.Number = int(i + 1)
+		chunk.OffSet = i * partSize
+		chunk.Size = partSize
+		chunks = append(chunks, chunk)
+	}
+
+	if totalBytes%partSize > 0 {
+		chunk.Number = len(chunks) + 1
+		chunk.OffSet = int64(len(chunks)) * partSize
+		chunk.Size = totalBytes % partSize
+		chunks = append(chunks, chunk)
+		partNum++
+	}
+	return chunks, int(partNum), nil
+}
+
+func (s *ObjectService) MultiCopy(ctx context.Context, name string, sourceURL string, opt *MultiCopyOptions, id ...string) (*ObjectCopyResult, *Response, error) {
+	resp, err := s.innerHead(ctx, sourceURL, nil, id)
+	if err != nil {
+		return nil, nil, err
+	}
+	totalBytes := resp.ContentLength
+	surl := strings.SplitN(sourceURL, "/", 2)
+	if len(surl) < 2 {
+		return nil, nil, errors.New(fmt.Sprintf("x-cos-copy-source format error: %s", sourceURL))
+	}
+	var u string
+	if len(id) == 1 {
+		u = fmt.Sprintf("%s/%s?versionId=%s", surl[0], encodeURIComponent(surl[1]), id[0])
+	} else if len(id) == 0 {
+		u = fmt.Sprintf("%s/%s", surl[0], encodeURIComponent(surl[1]))
+	} else {
+		return nil, nil, errors.New("wrong params")
+	}
+
+	if opt == nil {
+		opt = &MultiCopyOptions{}
+	}
+	chunks, partNum, err := SplitCopyFileIntoChunks(totalBytes, opt.PartSize)
+	if err != nil {
+		return nil, nil, err
+	}
+	if partNum == 0 || totalBytes < singleUploadMaxLength {
+		if len(id) > 0 {
+			return s.Copy(ctx, name, sourceURL, opt.OptCopy, id[0])
+		} else {
+			return s.Copy(ctx, name, sourceURL, opt.OptCopy)
+		}
+	}
+	optini := CopyOptionsToMulti(opt.OptCopy)
+	var uploadID string
+	res, _, err := s.InitiateMultipartUpload(ctx, name, optini)
+	if err != nil {
+		return nil, nil, err
+	}
+	uploadID = res.UploadID
+
+	var poolSize int
+	if opt.ThreadPoolSize > 0 {
+		poolSize = opt.ThreadPoolSize
+	} else {
+		poolSize = 1
+	}
+
+	chjobs := make(chan *CopyJobs, 100)
+	chresults := make(chan *CopyResults, 10000)
+	optcom := &CompleteMultipartUploadOptions{}
+
+	for w := 1; w <= poolSize; w++ {
+		go copyworker(s, chjobs, chresults)
+	}
+
+	go func() {
+		for _, chunk := range chunks {
+			partOpt := &ObjectCopyPartOptions{
+				XCosCopySource: u,
+			}
+			job := &CopyJobs{
+				Name:       name,
+				RetryTimes: 3,
+				UploadId:   uploadID,
+				Chunk:      chunk,
+				Opt:        partOpt,
+			}
+			chjobs <- job
+		}
+		close(chjobs)
+	}()
+
+	err = nil
+	for i := 0; i < partNum; i++ {
+		res := <-chresults
+		if res.res == nil || res.err != nil {
+			err = fmt.Errorf("UploadID %s, part %d failed to get resp content. error: %s", uploadID, res.PartNumber, res.err.Error())
+			break
+		}
+		etag := res.res.ETag
+		optcom.Parts = append(optcom.Parts, Object{
+			PartNumber: res.PartNumber, ETag: etag},
+		)
+	}
+	close(chresults)
+	if err != nil {
+		return nil, nil, err
+	}
+	sort.Sort(ObjectList(optcom.Parts))
+
+	v, resp, err := s.CompleteMultipartUpload(ctx, name, uploadID, optcom)
+	if err != nil {
+		s.AbortMultipartUpload(ctx, name, uploadID)
+	}
+	cpres := &ObjectCopyResult{
+		ETag:      v.ETag,
+		CRC64:     resp.Header.Get("x-cos-hash-crc64ecma"),
+		VersionId: resp.Header.Get("x-cos-version-id"),
+	}
+	return cpres, resp, err
+}