diff --git a/drivers/139/driver.go b/drivers/139/driver.go
index 0dc2f245277..2fedc477730 100644
--- a/drivers/139/driver.go
+++ b/drivers/139/driver.go
@@ -357,7 +357,10 @@ const (
 	TB
 )
 
-func getPartSize(size int64) int64 {
+func (d *Yun139) getPartSize(size int64) int64 {
+	if d.CustomUploadPartSize != 0 {
+		return d.CustomUploadPartSize
+	}
 	// 网盘对于分片数量存在上限
 	if size/GB > 30 {
 		return 512 * MB
@@ -382,7 +385,7 @@ func (d *Yun139) Put(ctx context.Context, dstDir model.Obj, stream model.FileStr
 		}
 
 		partInfos := []PartInfo{}
-		var partSize = getPartSize(stream.GetSize())
+		var partSize = d.getPartSize(stream.GetSize())
 		part := (stream.GetSize() + partSize - 1) / partSize
 		if part == 0 {
 			part = 1
@@ -558,7 +561,7 @@ func (d *Yun139) Put(ctx context.Context, dstDir model.Obj, stream model.FileStr
 		// Progress
 		p := driver.NewProgress(stream.GetSize(), up)
 
-		var partSize = getPartSize(stream.GetSize())
+		var partSize = d.getPartSize(stream.GetSize())
 		part := (stream.GetSize() + partSize - 1) / partSize
 		if part == 0 {
 			part = 1
diff --git a/drivers/139/meta.go b/drivers/139/meta.go
index 56a4c1df96b..680e469ded9 100644
--- a/drivers/139/meta.go
+++ b/drivers/139/meta.go
@@ -9,8 +9,9 @@ type Addition struct {
 	//Account       string `json:"account" required:"true"`
 	Authorization string `json:"authorization" type:"text" required:"true"`
 	driver.RootID
-	Type    string `json:"type" type:"select" options:"personal,family,personal_new" default:"personal"`
-	CloudID string `json:"cloud_id"`
+	Type                 string `json:"type" type:"select" options:"personal,family,personal_new" default:"personal"`
+	CloudID              string `json:"cloud_id"`
+	CustomUploadPartSize int64  `json:"custom_upload_part_size" type:"number" default:"0" help:"0 for auto"`
 }
 
 var config = driver.Config{