diff --git a/server/upload/internal/logic/uploadfilebaselogic.go b/server/upload/internal/logic/uploadfilebaselogic.go
index 28a8ae1c..46c210c0 100644
--- a/server/upload/internal/logic/uploadfilebaselogic.go
+++ b/server/upload/internal/logic/uploadfilebaselogic.go
@@ -1,13 +1,12 @@
 package logic
 
 import (
-	"encoding/base64"
 	"fmt"
 	"fusenapi/model/gmodel"
 	"fusenapi/utils/auth"
 	"fusenapi/utils/basic"
+	"fusenapi/utils/file"
 	"fusenapi/utils/hash"
-	"strings"
 	"time"
 
 	"context"
@@ -97,12 +96,11 @@ func (l *UploadFileBaseLogic) UploadFileBase(req *types.UploadFileBaseReq, useri
 		uploadUrl.ResourceId = resourceId
 		uploadUrl.ResourceUrl = *resourceInfo.ResourceUrl
 	} else {
-		RBase64Point := strings.LastIndex(req.FileData, ";base64,") + 8
-		req.FileData = req.FileData[RBase64Point:]
-		dist, err := base64.StdEncoding.DecodeString(req.FileData)
+		dist, err := file.FileBase64ToByte(req.FileData)
 
 		if err != nil {
 			logx.Error(err)
+			return resp.SetStatus(basic.CodeFileUploadErr, "file upload err,base64tobyte error")
 		}
 
 		// 创建S3对象存储请求
diff --git a/utils/file/base64.go b/utils/file/base64.go
new file mode 100644
index 00000000..84825501
--- /dev/null
+++ b/utils/file/base64.go
@@ -0,0 +1,17 @@
+package file
+
+import (
+	"encoding/base64"
+	"strings"
+)
+
+func FileBase64ToByte(fileData string) ([]byte, error) {
+	RBase64Point := strings.LastIndex(fileData, ";base64,") + 8
+	fileDataStr := fileData[RBase64Point:]
+	dist, err := base64.StdEncoding.DecodeString(fileDataStr)
+
+	if err != nil {
+		return nil, err
+	}
+	return dist, nil
+}