diff --git a/kernel/api/file.go b/kernel/api/file.go
index a842eb711..e9453e899 100644
--- a/kernel/api/file.go
+++ b/kernel/api/file.go
@@ -36,6 +36,21 @@ import (
 	"github.com/siyuan-note/siyuan/kernel/util"
 )
 
+func getUniqueFilename(c *gin.Context) {
+	ret := gulu.Ret.NewResult()
+	defer c.JSON(http.StatusOK, ret)
+
+	arg, ok := util.JsonArg(c, ret)
+	if !ok {
+		return
+	}
+
+	filePath := arg["path"].(string)
+	ret.Data = map[string]interface{}{
+		"path": util.GetUniqueFilename(filePath),
+	}
+}
+
 func globalCopyFiles(c *gin.Context) {
 	ret := gulu.Ret.NewResult()
 	defer c.JSON(http.StatusOK, ret)
diff --git a/kernel/api/router.go b/kernel/api/router.go
index b0b3d07b5..4801ecc5a 100644
--- a/kernel/api/router.go
+++ b/kernel/api/router.go
@@ -208,6 +208,7 @@ func ServeAPI(ginServer *gin.Engine) {
 	ginServer.Handle("POST", "/api/file/removeFile", model.CheckAuth, model.CheckReadonly, removeFile)
 	ginServer.Handle("POST", "/api/file/renameFile", model.CheckAuth, model.CheckReadonly, renameFile)
 	ginServer.Handle("POST", "/api/file/readDir", model.CheckAuth, readDir)
+	ginServer.Handle("POST", "/api/file/getUniqueFilename", model.CheckAuth, getUniqueFilename)
 
 	ginServer.Handle("POST", "/api/ref/refreshBacklink", model.CheckAuth, refreshBacklink)
 	ginServer.Handle("POST", "/api/ref/getBacklink", model.CheckAuth, getBacklink)
diff --git a/kernel/model/export.go b/kernel/model/export.go
index 795aedffa..58c31d7aa 100644
--- a/kernel/model/export.go
+++ b/kernel/model/export.go
@@ -180,7 +180,7 @@ func ExportAv2CSV(avID, blockID string) (zipPath string, err error) {
 	}
 	writer.Flush()
 
-	zipPath = getUniqueFilename(exportFolder + ".db.zip")
+	zipPath = exportFolder + ".db.zip"
 	zip, err := gulu.Zip.Create(zipPath)
 	if nil != err {
 		logging.LogErrorf("create export .db.zip [%s] failed: %s", exportFolder, err)
@@ -209,24 +209,6 @@ func ExportAv2CSV(avID, blockID string) (zipPath string, err error) {
 	return
 }
 
-func getUniqueFilename(filePath string) string {
-	if !gulu.File.IsExist(filePath) {
-		return filePath
-	}
-
-	ext := filepath.Ext(filePath)
-	base := strings.TrimSuffix(filepath.Base(filePath), ext)
-	dir := filepath.Dir(filePath)
-	i := 1
-	for {
-		newPath := filepath.Join(dir, base+" ("+strconv.Itoa(i)+ext) + ")"
-		if !gulu.File.IsExist(newPath) {
-			return newPath
-		}
-		i++
-	}
-}
-
 func Export2Liandi(id string) (err error) {
 	tree, err := LoadTreeByBlockID(id)
 	if nil != err {
diff --git a/kernel/util/file.go b/kernel/util/file.go
index 4af6e40b0..75c19ed82 100644
--- a/kernel/util/file.go
+++ b/kernel/util/file.go
@@ -24,6 +24,7 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"strconv"
 	"strings"
 	"unicode/utf8"
 
@@ -34,6 +35,24 @@ import (
 	"github.com/siyuan-note/logging"
 )
 
+func GetUniqueFilename(filePath string) string {
+	if !gulu.File.IsExist(filePath) {
+		return filePath
+	}
+
+	ext := filepath.Ext(filePath)
+	base := strings.TrimSuffix(filepath.Base(filePath), ext)
+	dir := filepath.Dir(filePath)
+	i := 1
+	for {
+		newPath := filepath.Join(dir, base+" ("+strconv.Itoa(i)+")"+ext)
+		if !gulu.File.IsExist(newPath) {
+			return newPath
+		}
+		i++
+	}
+}
+
 func GetMimeTypeByExt(filePath string) (ret string) {
 	ret = mime.TypeByExtension(filepath.Ext(filePath))
 	if "" == ret {