diff --git a/autogl/module/hpo/autone.py b/autogl/module/hpo/autone.py
index 8464aa8..953cc94 100644
--- a/autogl/module/hpo/autone.py
+++ b/autogl/module/hpo/autone.py
@@ -7,7 +7,7 @@ import numpy as np
 from tqdm import trange
 from . import register_hpo
 from .base import BaseHPOptimizer, TimeTooLimitedError
-
+import random
 from .autone_file import utils
 
 from torch_geometric.data import GraphSAINTRandomWalkSampler
@@ -16,13 +16,14 @@ from ..feature.graph import SgNetLSD
 
 from torch_geometric.data import InMemoryDataset
 
+from autogl.backend import DependentBackend
+_isdgl=DependentBackend.is_dgl()
 
 class _MyDataset(InMemoryDataset):
     def __init__(self, datalist) -> None:
         super().__init__()
         self.data, self.slices = self.collate(datalist)
 
-
 @register_hpo("autone")
 class AutoNE(BaseHPOptimizer):
     """
@@ -48,7 +49,7 @@ class AutoNE(BaseHPOptimizer):
         self.subgraphs = kwargs.get("subgraphs", 2)
         self.sub_evals = kwargs.get("sub_evals", 2)
         self.sample_batch_size = kwargs.get("sample_batch_size", 150)
-        self.sample_walk_length = kwargs.get("sample_walk_length", 2)
+        self.sample_walk_length = kwargs.get("sample_walk_length", 100)
 
     def optimize(self, trainer, dataset, time_limit=None, memory_limit=None):
         """
@@ -78,6 +79,15 @@ class AutoNE(BaseHPOptimizer):
                 results.append(in_dataset)
             return results
 
+        def sample_subgraph_dgl(whole_data):
+            data = whole_data.data # dgl data
+            # find data with different labels
+            # random walk
+            start = [random.randint(0, data.num_nodes - 1) for i in range(self.subgraphs)]
+            traces, _  = dgl.sampling.random_walk_with_restart(data, start, length=self.sample_batch_size, restart_prob= 1 / self.sample_walk_length))
+            subgraphs = dgl.node_subgraph(data, traces[i, :] for i in traces.size(0))
+            return subgraphs
+
         func = SgNetLSD()
 
         def get_wne(graph):
@@ -112,7 +122,10 @@ class AutoNE(BaseHPOptimizer):
         info = []
         K = utils.K(len(params.type_))
         gp = utils.GaussianProcessRegressor(K)
-        sample_graphs = sample_subgraph(dataset)
+        if _isdgl:
+            sample_graphs = sample_subgraph_dgl(dataset)
+        else:
+            sample_graphs = sample_subgraph(dataset)
         print("Sample Phase:\n")
         for t in trange(sampled_number):
             b_t = time.time()
diff --git a/examples/node_classification.py b/examples/node_classification.py
index f850cb5..718971e 100644
--- a/examples/node_classification.py
+++ b/examples/node_classification.py
@@ -37,7 +37,7 @@ if __name__ == "__main__":
         help="config to use",
     )
     # following arguments will override parameters in the config file
-    parser.add_argument("--hpo", type=str, default="tpe", help="hpo methods")
+    parser.add_argument("--hpo", type=str, default="autone", help="hpo methods")
     parser.add_argument(
         "--max_eval", type=int, default=50, help="max hpo evaluation times"
     )