diff --git a/ppsci/solver/solver.py b/ppsci/solver/solver.py
index e66841d5a8..951527feb4 100644
--- a/ppsci/solver/solver.py
+++ b/ppsci/solver/solver.py
@@ -744,7 +744,7 @@ def export(
         )
 
         # save static graph model to disk
-        if osp.isdir(osp.dirname(export_path)):
+        if len(osp.dirname(export_path)):
             os.makedirs(osp.dirname(export_path), exist_ok=True)
         try:
             jit.save(static_model, export_path)