diff --git a/fastNLP/io/dataset_loader.py b/fastNLP/io/dataset_loader.py
index d175d3b9..e366c6ea 100644
--- a/fastNLP/io/dataset_loader.py
+++ b/fastNLP/io/dataset_loader.py
@@ -28,6 +28,8 @@ from ..core.instance import Instance
 from .file_reader import _read_csv, _read_json, _read_conll
 from .base_loader import DataSetLoader
 from .data_loader.sst import SSTLoader
+from ..core.const import Const
+
 
 class PeopleDailyCorpusLoader(DataSetLoader):
     """
@@ -257,9 +259,9 @@ class SNLILoader(JsonLoader):
 
     def __init__(self):
         fields = {
-            'sentence1_parse': 'words1',
-            'sentence2_parse': 'words2',
-            'gold_label': 'target',
+            'sentence1_parse': Const.INPUTS(0),
+            'sentence2_parse': Const.INPUTS(1),
+            'gold_label': Const.TARGET,
         }
         super(SNLILoader, self).__init__(fields=fields)
 
@@ -271,10 +273,10 @@ class SNLILoader(JsonLoader):
             return t.leaves()
 
         ds.apply(lambda ins: parse_tree(
-            ins['words1']), new_field_name='words1')
+            ins[Const.INPUTS(0)]), new_field_name=Const.INPUTS(0))
         ds.apply(lambda ins: parse_tree(
-            ins['words2']), new_field_name='words2')
-        ds.drop(lambda x: x['target'] == '-')
+            ins[Const.INPUTS(1)]), new_field_name=Const.INPUTS(1))
+        ds.drop(lambda x: x[Const.TARGET] == '-')
         return ds
 
 
diff --git a/reproduction/matching/data/SNLIDataLoader.py b/reproduction/matching/data/SNLIDataLoader.py
new file mode 100644
index 00000000..6f6bbecd
--- /dev/null
+++ b/reproduction/matching/data/SNLIDataLoader.py
@@ -0,0 +1,6 @@
+
+from fastNLP.io.dataset_loader import SNLILoader
+
+# TODO: still in progress
+
+
diff --git a/reproduction/matching/model/bert.py b/reproduction/matching/model/bert.py
new file mode 100644
index 00000000..6b13ce2a
--- /dev/null
+++ b/reproduction/matching/model/bert.py
@@ -0,0 +1,13 @@
+
+from fastNLP.models import BaseModel
+from fastNLP.modules.encoder.bert import BertModel
+
+
+class BertForSNLI(BaseModel):
+    # TODO: still in progress
+
+    def __init(self):
+        super(BertForSNLI, self).__init__()
+
+    def forward(self, words, segment_id, seq_len):
+        pass
diff --git a/reproduction/matching/test/test_snlidataloader.py b/reproduction/matching/test/test_snlidataloader.py
new file mode 100644
index 00000000..9a0fb9ee
--- /dev/null
+++ b/reproduction/matching/test/test_snlidataloader.py
@@ -0,0 +1,10 @@
+import unittest
+from reproduction.matching.data import SNLIDataLoader
+from fastNLP.core.vocabulary import VocabularyOption
+
+
+class TestCWSDataLoader(unittest.TestCase):
+    def test_case1(self):
+        snli_loader = SNLIDataLoader()
+        # TODO: still in progress
+