diff --git a/drivers/115_open/driver.go b/drivers/115_open/driver.go
index 00337c0b..0eb943ac 100644
--- a/drivers/115_open/driver.go
+++ b/drivers/115_open/driver.go
@@ -2,7 +2,6 @@ package _115_open
 
 import (
 	"context"
-	"encoding/base64"
 	"fmt"
 	"io"
 	"net/http"
@@ -16,7 +15,6 @@ import (
 	"github.com/alist-org/alist/v3/internal/model"
 	"github.com/alist-org/alist/v3/internal/op"
 	"github.com/alist-org/alist/v3/pkg/utils"
-	"github.com/aliyun/aliyun-oss-go-sdk/oss"
 	sdk "github.com/xhofe/115-sdk-go"
 )
 
@@ -265,18 +263,7 @@ func (d *Open115) Put(ctx context.Context, dstDir model.Obj, file model.FileStre
 		return err
 	}
 	// 4. upload
-	ossClient, err := oss.New(tokenResp.Endpoint, tokenResp.AccessKeyId, tokenResp.AccessKeySecret, oss.SecurityToken(tokenResp.SecurityToken))
-	if err != nil {
-		return err
-	}
-	bucket, err := ossClient.Bucket(resp.Bucket)
-	if err != nil {
-		return err
-	}
-	err = bucket.PutObject(resp.Object, tempF,
-		oss.Callback(base64.StdEncoding.EncodeToString([]byte(resp.Callback.Value.Callback))),
-		oss.CallbackVar(base64.StdEncoding.EncodeToString([]byte(resp.Callback.Value.CallbackVar))),
-	)
+	err = d.multpartUpload(ctx, tempF, file, up, tokenResp, resp)
 	if err != nil {
 		return err
 	}
diff --git a/drivers/115_open/upload.go b/drivers/115_open/upload.go
new file mode 100644
index 00000000..282582ef
--- /dev/null
+++ b/drivers/115_open/upload.go
@@ -0,0 +1,140 @@
+package _115_open
+
+import (
+	"context"
+	"encoding/base64"
+	"io"
+	"time"
+
+	"github.com/alist-org/alist/v3/internal/driver"
+	"github.com/alist-org/alist/v3/internal/model"
+	"github.com/alist-org/alist/v3/pkg/utils"
+	"github.com/aliyun/aliyun-oss-go-sdk/oss"
+	"github.com/avast/retry-go"
+	sdk "github.com/xhofe/115-sdk-go"
+)
+
+func calPartSize(fileSize int64) int64 {
+	var partSize int64 = 20 * utils.MB
+	if fileSize > partSize {
+		if fileSize > 1*utils.TB { // file Size over 1TB
+			partSize = 5 * utils.GB // file part size 5GB
+		} else if fileSize > 768*utils.GB { // over 768GB
+			partSize = 109951163 // ≈ 104.8576MB, split 1TB into 10,000 part
+		} else if fileSize > 512*utils.GB { // over 512GB
+			partSize = 82463373 // ≈ 78.6432MB
+		} else if fileSize > 384*utils.GB { // over 384GB
+			partSize = 54975582 // ≈ 52.4288MB
+		} else if fileSize > 256*utils.GB { // over 256GB
+			partSize = 41231687 // ≈ 39.3216MB
+		} else if fileSize > 128*utils.GB { // over 128GB
+			partSize = 27487791 // ≈ 26.2144MB
+		}
+	}
+	return partSize
+}
+
+func (d *Open115) singleUpload(ctx context.Context, tempF model.File, tokenResp *sdk.UploadGetTokenResp, initResp *sdk.UploadInitResp) error {
+	ossClient, err := oss.New(tokenResp.Endpoint, tokenResp.AccessKeyId, tokenResp.AccessKeySecret, oss.SecurityToken(tokenResp.SecurityToken))
+	if err != nil {
+		return err
+	}
+	bucket, err := ossClient.Bucket(initResp.Bucket)
+	if err != nil {
+		return err
+	}
+
+	err = bucket.PutObject(initResp.Object, tempF,
+		oss.Callback(base64.StdEncoding.EncodeToString([]byte(initResp.Callback.Value.Callback))),
+		oss.CallbackVar(base64.StdEncoding.EncodeToString([]byte(initResp.Callback.Value.CallbackVar))),
+	)
+
+	return err
+}
+
+// type CallbackResult struct {
+// 	State   bool   `json:"state"`
+// 	Code    int    `json:"code"`
+// 	Message string `json:"message"`
+// 	Data    struct {
+// 		PickCode string `json:"pick_code"`
+// 		FileName string `json:"file_name"`
+// 		FileSize int64  `json:"file_size"`
+// 		FileID   string `json:"file_id"`
+// 		ThumbURL string `json:"thumb_url"`
+// 		Sha1     string `json:"sha1"`
+// 		Aid      int    `json:"aid"`
+// 		Cid      string `json:"cid"`
+// 	} `json:"data"`
+// }
+
+func (d *Open115) multpartUpload(ctx context.Context, tempF model.File, stream model.FileStreamer, up driver.UpdateProgress, tokenResp *sdk.UploadGetTokenResp, initResp *sdk.UploadInitResp) error {
+	fileSize := stream.GetSize()
+	chunkSize := calPartSize(fileSize)
+
+	ossClient, err := oss.New(tokenResp.Endpoint, tokenResp.AccessKeyId, tokenResp.AccessKeySecret, oss.SecurityToken(tokenResp.SecurityToken))
+	if err != nil {
+		return err
+	}
+	bucket, err := ossClient.Bucket(initResp.Bucket)
+	if err != nil {
+		return err
+	}
+
+	imur, err := bucket.InitiateMultipartUpload(initResp.Object, oss.Sequential())
+	if err != nil {
+		return err
+	}
+
+	partNum := (stream.GetSize() + chunkSize - 1) / chunkSize
+	parts := make([]oss.UploadPart, partNum)
+	offset := int64(0)
+	for i := int64(1); i <= partNum; i++ {
+		if utils.IsCanceled(ctx) {
+			return ctx.Err()
+		}
+
+		partSize := chunkSize
+		if i == partNum {
+			partSize = fileSize - (i-1)*chunkSize
+		}
+		rd := utils.NewMultiReadable(io.LimitReader(stream, partSize))
+		err = retry.Do(func() error {
+			_ = rd.Reset()
+			rateLimitedRd := driver.NewLimitedUploadStream(ctx, rd)
+			part, err := bucket.UploadPart(imur, rateLimitedRd, partSize, int(i))
+			if err != nil {
+				return err
+			}
+			parts[i-1] = part
+			return nil
+		},
+			retry.Attempts(3),
+			retry.DelayType(retry.BackOffDelay),
+			retry.Delay(time.Second))
+		if err != nil {
+			return err
+		}
+
+		if i == partNum {
+			offset = fileSize
+		} else {
+			offset += partSize
+		}
+		up(float64(offset) / float64(fileSize))
+	}
+
+	// callbackRespBytes := make([]byte, 1024)
+	_, err = bucket.CompleteMultipartUpload(
+		imur,
+		parts,
+		oss.Callback(base64.StdEncoding.EncodeToString([]byte(initResp.Callback.Value.Callback))),
+		oss.CallbackVar(base64.StdEncoding.EncodeToString([]byte(initResp.Callback.Value.CallbackVar))),
+		// oss.CallbackResult(&callbackRespBytes),
+	)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}