diff --git a/ppsci/data/dataset/vtu_dataset.py b/ppsci/data/dataset/vtu_dataset.py
index f238a45c7f..f3198c8839 100644
--- a/ppsci/data/dataset/vtu_dataset.py
+++ b/ppsci/data/dataset/vtu_dataset.py
@@ -37,6 +37,17 @@ class VtuDataset(io.Dataset):
         labels (Optional[Dict[str, float]]): Temporary variable for [load_vtk_with_time_file].
         transforms (vision.Compose, optional): Compose object contains sample wise.
             transform(s).
+
+    Examples:
+        >>> from ppsci.dataset import VtuDataset
+
+        >>> dataset = VtuDataset(file_path='example.vtu') # doctest: +SKIP
+
+        >>> # get the length of the dataset
+        >>> dataset_size = len(dataset) # doctest: +SKIP
+        >>> # get the first sample of the data
+        >>> first_sample = dataset[0] # doctest: +SKIP
+        >>> print("First sample:", first_sample)
     """
 
     # Whether support batch indexing for speeding up fetching process.