diff --git a/ppdet/utils/download.py b/ppdet/utils/download.py
index 5697e14b6b68bbd295ff35569b60398b582f51ab..9f08d8aa36b155c27a2a281ce8420d1f541e7b89 100644
--- a/ppdet/utils/download.py
+++ b/ppdet/utils/download.py
@@ -298,7 +298,8 @@ def _download(url, path, md5sum=None):
         content_md5 = req.headers.get('content-md5')
         if not content_md5 or _md5check(
                 tmp_fullname,
-                binascii.hexlify(base64.b64decode(content_md5.strip('"')))):
+                binascii.hexlify(base64.b64decode(content_md5.strip(
+                    '"'))).decode()):
             shutil.move(tmp_fullname, fullname)
             return fullname
         else: