diff --git a/modelscope/hub/constants.py b/modelscope/hub/constants.py
index b4e37593..2ed86a41 100644
--- a/modelscope/hub/constants.py
+++ b/modelscope/hub/constants.py
@@ -32,7 +32,9 @@ MODELSCOPE_ENABLE_DEFAULT_HASH_VALIDATION = 'MODELSCOPE_ENABLE_DEFAULT_HASH_VALI
 ONE_YEAR_SECONDS = 24 * 365 * 60 * 60
 MODELSCOPE_REQUEST_ID = 'X-Request-ID'
 TEMPORARY_FOLDER_NAME = '._____temp'
-DEFAULT_MAX_WORKERS = min(8, os.cpu_count() + 4)
+DEFAULT_MAX_WORKERS = int(
+    os.getenv('DEFAULT_MAX_WORKERS', min(8,
+                                         os.cpu_count() + 4)))
 
 
 class Licenses(object):