diff --git a/src/agentscope_runtime/sandbox/manager/storage/oss_storage.py b/src/agentscope_runtime/sandbox/manager/storage/oss_storage.py
index 34251f612..57d30f9f7 100644
--- a/src/agentscope_runtime/sandbox/manager/storage/oss_storage.py
+++ b/src/agentscope_runtime/sandbox/manager/storage/oss_storage.py
@@ -37,7 +37,7 @@ def download_folder(self, source_path, destination_path):
                 os.path.relpath(obj.key, source_path),
             )
 
-            if obj.is_prefix():
+            if obj.is_prefix() or obj.key.endswith("/"):
                 # Create local directory
                 os.makedirs(local_path, exist_ok=True)
             else: