diff --git a/deepmd/utils/path.py b/deepmd/utils/path.py
index 377953cc35..1f9c4be3ef 100644
--- a/deepmd/utils/path.py
+++ b/deepmd/utils/path.py
@@ -320,7 +320,7 @@ def _load_h5py(cls, path: str, mode: str = "r") -> h5py.File:
         # this method has cache to avoid duplicated
         # loading from different DPH5Path
         # However the file will be never closed?
-        return h5py.File(path, mode)
+        return h5py.File(path, mode, locking=False)
 
     def load_numpy(self) -> np.ndarray:
         """Load NumPy array.