diff --git a/fastNLP/io/__init__.py b/fastNLP/io/__init__.py
index fe4ca245..d1d1dc5d 100644
--- a/fastNLP/io/__init__.py
+++ b/fastNLP/io/__init__.py
@@ -12,7 +12,7 @@
 __all__ = [
     'EmbedLoader',
 
-    'DataInfo',
+    'DataBundle',
     'DataSetLoader',
 
     'CSVLoader',
@@ -35,7 +35,7 @@ __all__ = [
 ]
 
 from .embed_loader import EmbedLoader
-from .base_loader import DataInfo, DataSetLoader
+from .base_loader import DataBundle, DataSetLoader
 from .dataset_loader import CSVLoader, JsonLoader
 from .model_io import ModelLoader, ModelSaver
 
diff --git a/fastNLP/io/base_loader.py b/fastNLP/io/base_loader.py
index 8cff1da1..62793836 100644
--- a/fastNLP/io/base_loader.py
+++ b/fastNLP/io/base_loader.py
@@ -1,6 +1,6 @@
 __all__ = [
     "BaseLoader",
-    'DataInfo',
+    'DataBundle',
     'DataSetLoader',
 ]
 
@@ -109,7 +109,7 @@ def _uncompress(src, dst):
         raise ValueError('unsupported file {}'.format(src))
 
 
-class DataInfo:
+class DataBundle:
     """
     经过处理的数据信息，包括一系列数据集（比如：分开的训练集、验证集和测试集）及它们所用的词表和词嵌入。
 
@@ -201,20 +201,20 @@ class DataSetLoader:
         """
         raise NotImplementedError
 
-    def process(self, paths: Union[str, Dict[str, str]], **options) -> DataInfo:
+    def process(self, paths: Union[str, Dict[str, str]], **options) -> DataBundle:
         """
         对于特定的任务和数据集，读取并处理数据，返回处理DataInfo类对象或字典。
 
         从指定一个或多个路径中的文件中读取数据，DataInfo对象中可以包含一个或多个数据集 。
         如果处理多个路径，传入的 dict 的 key 与返回DataInfo中的 dict 中的 key 保存一致。
 
-        返回的 :class:`DataInfo` 对象有如下属性：
+        返回的 :class:`DataBundle` 对象有如下属性：
 
         - vocabs: 由从数据集中获取的词表组成的字典，每个词表
         - datasets: 一个dict，包含一系列 :class:`~fastNLP.DataSet` 类型的对象。其中 field 的命名参考 :mod:`~fastNLP.core.const`
 
         :param paths: 原始数据读取的路径
         :param options: 根据不同的任务和数据集，设计自己的参数
-        :return: 返回一个 DataInfo
+        :return: 返回一个 DataBundle
         """
         raise NotImplementedError
diff --git a/fastNLP/io/data_loader/imdb.py b/fastNLP/io/data_loader/imdb.py
index b4c2c1f9..bf53c5be 100644
--- a/fastNLP/io/data_loader/imdb.py
+++ b/fastNLP/io/data_loader/imdb.py
@@ -2,7 +2,7 @@
 from typing import Union, Dict
 
 from ..embed_loader import EmbeddingOption, EmbedLoader
-from ..base_loader import DataSetLoader, DataInfo
+from ..base_loader import DataSetLoader, DataBundle
 from ...core.vocabulary import VocabularyOption, Vocabulary
 from ...core.dataset import DataSet
 from ...core.instance import Instance
@@ -48,7 +48,7 @@ class IMDBLoader(DataSetLoader):
                 char_level_op=False):
 
         datasets = {}
-        info = DataInfo()
+        info = DataBundle()
         for name, path in paths.items():
             dataset = self.load(path)
             datasets[name] = dataset
diff --git a/fastNLP/io/data_loader/matching.py b/fastNLP/io/data_loader/matching.py
index ce9c280b..3f5759d6 100644
--- a/fastNLP/io/data_loader/matching.py
+++ b/fastNLP/io/data_loader/matching.py
@@ -4,7 +4,7 @@ from typing import Union, Dict , List
 
 from ...core.const import Const
 from ...core.vocabulary import Vocabulary
-from ..base_loader import DataInfo, DataSetLoader
+from ..base_loader import DataBundle, DataSetLoader
 from ..file_utils import _get_base_url, cached_path, PRETRAINED_BERT_MODEL_DIR
 from ...modules.encoder._bert import BertTokenizer
 
@@ -34,7 +34,7 @@ class MatchingLoader(DataSetLoader):
                 cut_text: int = None, get_index=True, auto_pad_length: int=None,
                 auto_pad_token: str='<pad>', set_input: Union[list, str, bool]=True,
                 set_target: Union[list, str, bool] = True, concat: Union[str, list, bool]=None, 
-                extra_split: List[str]=['-'], ) -> DataInfo:
+                extra_split: List[str]=['-'], ) -> DataBundle:
         """
         :param paths: str或者Dict[str, str]。如果是str，则为数据集所在的文件夹或者是全路径文件名：如果是文件夹，
             则会从self.paths里面找对应的数据集名称与文件名。如果是Dict，则为数据集名称（如train、dev、test）和
@@ -80,7 +80,7 @@ class MatchingLoader(DataSetLoader):
         else:
             path = paths
 
-        data_info = DataInfo()
+        data_info = DataBundle()
         for data_name in path.keys():
             data_info.datasets[data_name] = self._load(path[data_name])
 
diff --git a/fastNLP/io/data_loader/mtl.py b/fastNLP/io/data_loader/mtl.py
index 548a985b..940ece51 100644
--- a/fastNLP/io/data_loader/mtl.py
+++ b/fastNLP/io/data_loader/mtl.py
@@ -1,7 +1,7 @@
 
 from typing import Union, Dict
 
-from ..base_loader import DataInfo
+from ..base_loader import DataBundle
 from ..dataset_loader import CSVLoader
 from ...core.vocabulary import Vocabulary, VocabularyOption
 from ...core.const import Const
@@ -37,7 +37,7 @@ class MTL16Loader(CSVLoader):
 
         paths = check_dataloader_paths(paths)
         datasets = {}
-        info = DataInfo()
+        info = DataBundle()
         for name, path in paths.items():
             dataset = self.load(path)
             datasets[name] = dataset
diff --git a/fastNLP/io/data_loader/sst.py b/fastNLP/io/data_loader/sst.py
index 05d63e2f..ecbabd49 100644
--- a/fastNLP/io/data_loader/sst.py
+++ b/fastNLP/io/data_loader/sst.py
@@ -2,7 +2,7 @@
 from typing import Union, Dict
 from nltk import Tree
 
-from ..base_loader import DataInfo, DataSetLoader
+from ..base_loader import DataBundle, DataSetLoader
 from ..dataset_loader import CSVLoader
 from ...core.vocabulary import VocabularyOption, Vocabulary
 from ...core.dataset import DataSet
@@ -73,7 +73,7 @@ class SSTLoader(DataSetLoader):
         tgt_vocab = Vocabulary(unknown=None, padding=None) \
             if tgt_vocab_op is None else Vocabulary(**tgt_vocab_op)
 
-        info = DataInfo()
+        info = DataBundle()
         origin_subtree = self.subtree
         self.subtree = train_subtree
         info.datasets['train'] = self._load(paths['train'])
@@ -126,7 +126,7 @@ class SST2Loader(CSVLoader):
 
         paths = check_dataloader_paths(paths)
         datasets = {}
-        info = DataInfo()
+        info = DataBundle()
         for name, path in paths.items():
             dataset = self.load(path)
             datasets[name] = dataset
diff --git a/fastNLP/io/data_loader/yelp.py b/fastNLP/io/data_loader/yelp.py
index 41856200..c287a90c 100644
--- a/fastNLP/io/data_loader/yelp.py
+++ b/fastNLP/io/data_loader/yelp.py
@@ -6,7 +6,7 @@ from ...core.const import Const
 from ...core.dataset import DataSet
 from ...core.instance import Instance
 from ...core.vocabulary import VocabularyOption, Vocabulary
-from ..base_loader import DataInfo, DataSetLoader
+from ..base_loader import DataBundle, DataSetLoader
 from typing import Union, Dict
 from ..utils import check_dataloader_paths, get_tokenizer
 
@@ -58,7 +58,7 @@ class YelpLoader(DataSetLoader):
                 tgt_vocab_op: VocabularyOption = None,
                 char_level_op=False):
         paths = check_dataloader_paths(paths)
-        info = DataInfo(datasets=self.load(paths))
+        info = DataBundle(datasets=self.load(paths))
         src_vocab = Vocabulary() if src_vocab_op is None else Vocabulary(**src_vocab_op)
         tgt_vocab = Vocabulary(unknown=None, padding=None) \
             if tgt_vocab_op is None else Vocabulary(**tgt_vocab_op)
diff --git a/reproduction/Summarization/Baseline/data/dataloader.py b/reproduction/Summarization/Baseline/data/dataloader.py
index fe787c31..57702904 100644
--- a/reproduction/Summarization/Baseline/data/dataloader.py
+++ b/reproduction/Summarization/Baseline/data/dataloader.py
@@ -2,7 +2,7 @@ import pickle
 import numpy as np
 
 from fastNLP.core.vocabulary import Vocabulary
-from fastNLP.io.base_loader import DataInfo
+from fastNLP.io.base_loader import DataBundle
 from fastNLP.io.dataset_loader import JsonLoader
 from fastNLP.core.const import Const
 
@@ -66,7 +66,7 @@ class SummarizationLoader(JsonLoader):
         :param domain: bool  build vocab for publication, use 'X' for unknown
         :param tag: bool  build vocab for tag, use 'X' for unknown
         :param load_vocab: bool  build vocab (False) or load vocab (True)
-        :return: DataInfo
+        :return: DataBundle
             datasets: dict  keys correspond to the paths dict
             vocabs: dict  key: vocab(if "train" in paths), domain(if domain=True), tag(if tag=True)
             embeddings: optional
@@ -182,7 +182,7 @@ class SummarizationLoader(JsonLoader):
         for ds in datasets.values():
             vocab_dict["vocab"].index_dataset(ds, field_name=Const.INPUT, new_field_name=Const.INPUT)
 
-        return DataInfo(vocabs=vocab_dict, datasets=datasets)
+        return DataBundle(vocabs=vocab_dict, datasets=datasets)
 
 
 
diff --git a/reproduction/Summarization/BertSum/dataloader.py b/reproduction/Summarization/BertSum/dataloader.py
index cb1acd53..c5201261 100644
--- a/reproduction/Summarization/BertSum/dataloader.py
+++ b/reproduction/Summarization/BertSum/dataloader.py
@@ -3,7 +3,7 @@ from datetime import timedelta
 
 from fastNLP.io.dataset_loader import JsonLoader
 from fastNLP.modules.encoder._bert import BertTokenizer
-from fastNLP.io.base_loader import DataInfo
+from fastNLP.io.base_loader import DataBundle
 from fastNLP.core.const import Const
 
 class BertData(JsonLoader):
@@ -110,7 +110,7 @@ class BertData(JsonLoader):
             # set paddding value
             datasets[name].set_pad_val('article', 0)
 
-        return DataInfo(datasets=datasets)
+        return DataBundle(datasets=datasets)
 
 
 class BertSumLoader(JsonLoader):
@@ -154,4 +154,4 @@ class BertSumLoader(JsonLoader):
 
         print('Finished in {}'.format(timedelta(seconds=time()-start)))
 
-        return DataInfo(datasets=datasets)
+        return DataBundle(datasets=datasets)
diff --git a/reproduction/coreference_resolution/data_load/cr_loader.py b/reproduction/coreference_resolution/data_load/cr_loader.py
index 986afcd5..a424b0d1 100644
--- a/reproduction/coreference_resolution/data_load/cr_loader.py
+++ b/reproduction/coreference_resolution/data_load/cr_loader.py
@@ -1,7 +1,7 @@
 from fastNLP.io.dataset_loader import JsonLoader,DataSet,Instance
 from fastNLP.io.file_reader import _read_json
 from fastNLP.core.vocabulary import Vocabulary
-from fastNLP.io.base_loader import DataInfo
+from fastNLP.io.base_loader import DataBundle
 from reproduction.coreference_resolution.model.config import Config
 import reproduction.coreference_resolution.model.preprocess as preprocess
 
@@ -26,7 +26,7 @@ class CRLoader(JsonLoader):
         return dataset
 
     def process(self, paths, **kwargs):
-        data_info = DataInfo()
+        data_info = DataBundle()
         for name in ['train', 'test', 'dev']:
             data_info.datasets[name] = self.load(paths[name])
 
diff --git a/reproduction/joint_cws_parse/data/data_loader.py b/reproduction/joint_cws_parse/data/data_loader.py
index 0644b01d..3e6fec4b 100644
--- a/reproduction/joint_cws_parse/data/data_loader.py
+++ b/reproduction/joint_cws_parse/data/data_loader.py
@@ -1,6 +1,6 @@
 
 
-from fastNLP.io.base_loader import DataSetLoader, DataInfo
+from fastNLP.io.base_loader import DataSetLoader, DataBundle
 from fastNLP.io.data_loader import ConllLoader
 import numpy as np
 
@@ -76,7 +76,7 @@ class CTBxJointLoader(DataSetLoader):
                 gold_label_word_pairs:
         """
         paths = check_dataloader_paths(paths)
-        data = DataInfo()
+        data = DataBundle()
 
         for name, path in paths.items():
             dataset = self.load(path)
diff --git a/reproduction/matching/data/MatchingDataLoader.py b/reproduction/matching/data/MatchingDataLoader.py
index 7c32899c..67fa4c8d 100644
--- a/reproduction/matching/data/MatchingDataLoader.py
+++ b/reproduction/matching/data/MatchingDataLoader.py
@@ -5,7 +5,7 @@ from typing import Union, Dict
 
 from fastNLP.core.const import Const
 from fastNLP.core.vocabulary import Vocabulary
-from fastNLP.io.base_loader import DataInfo, DataSetLoader
+from fastNLP.io.base_loader import DataBundle, DataSetLoader
 from fastNLP.io.dataset_loader import JsonLoader, CSVLoader
 from fastNLP.io.file_utils import _get_base_url, cached_path, PRETRAINED_BERT_MODEL_DIR
 from fastNLP.modules.encoder._bert import BertTokenizer
@@ -35,7 +35,7 @@ class MatchingLoader(DataSetLoader):
                 to_lower=False, seq_len_type: str=None, bert_tokenizer: str=None,
                 cut_text: int = None, get_index=True, auto_pad_length: int=None,
                 auto_pad_token: str='<pad>', set_input: Union[list, str, bool]=True,
-                set_target: Union[list, str, bool] = True, concat: Union[str, list, bool]=None, ) -> DataInfo:
+                set_target: Union[list, str, bool] = True, concat: Union[str, list, bool]=None, ) -> DataBundle:
         """
         :param paths: str或者Dict[str, str]。如果是str，则为数据集所在的文件夹或者是全路径文件名：如果是文件夹，
             则会从self.paths里面找对应的数据集名称与文件名。如果是Dict，则为数据集名称（如train、dev、test）和
@@ -80,7 +80,7 @@ class MatchingLoader(DataSetLoader):
         else:
             path = paths
 
-        data_info = DataInfo()
+        data_info = DataBundle()
         for data_name in path.keys():
             data_info.datasets[data_name] = self._load(path[data_name])
 
diff --git a/reproduction/seqence_labelling/cws/data/CWSDataLoader.py b/reproduction/seqence_labelling/cws/data/CWSDataLoader.py
index e8440289..3c82d814 100644
--- a/reproduction/seqence_labelling/cws/data/CWSDataLoader.py
+++ b/reproduction/seqence_labelling/cws/data/CWSDataLoader.py
@@ -1,7 +1,7 @@
 
 from fastNLP.io.embed_loader import EmbeddingOption, EmbedLoader
 from fastNLP.core.vocabulary import VocabularyOption
-from fastNLP.io.base_loader import DataSetLoader, DataInfo
+from fastNLP.io.base_loader import DataSetLoader, DataBundle
 from typing import Union, Dict, List, Iterator
 from fastNLP import DataSet
 from fastNLP import Instance
@@ -161,7 +161,7 @@ class SigHanLoader(DataSetLoader):
         # 推荐大家使用这个check_data_loader_paths进行paths的验证
         paths = check_dataloader_paths(paths)
         datasets = {}
-        data = DataInfo()
+        data = DataBundle()
         bigram = bigram_vocab_opt is not None
         for name, path in paths.items():
             dataset = self.load(path, bigram=bigram)
diff --git a/reproduction/seqence_labelling/ner/data/Conll2003Loader.py b/reproduction/seqence_labelling/ner/data/Conll2003Loader.py
index 0e464640..1aeddcf8 100644
--- a/reproduction/seqence_labelling/ner/data/Conll2003Loader.py
+++ b/reproduction/seqence_labelling/ner/data/Conll2003Loader.py
@@ -1,6 +1,6 @@
 
 from fastNLP.core.vocabulary import VocabularyOption
-from fastNLP.io.base_loader import DataSetLoader, DataInfo
+from fastNLP.io.base_loader import DataSetLoader, DataBundle
 from typing import Union, Dict
 from fastNLP import Vocabulary
 from fastNLP import Const
@@ -51,7 +51,7 @@ class Conll2003DataLoader(DataSetLoader):
         """
         # 读取数据
         paths = check_dataloader_paths(paths)
-        data = DataInfo()
+        data = DataBundle()
         input_fields = [Const.TARGET, Const.INPUT, Const.INPUT_LEN]
         target_fields = [Const.TARGET, Const.INPUT_LEN]
         for name, path in paths.items():
diff --git a/reproduction/seqence_labelling/ner/data/OntoNoteLoader.py b/reproduction/seqence_labelling/ner/data/OntoNoteLoader.py
index 8a2c567d..f1ff83d8 100644
--- a/reproduction/seqence_labelling/ner/data/OntoNoteLoader.py
+++ b/reproduction/seqence_labelling/ner/data/OntoNoteLoader.py
@@ -1,5 +1,5 @@
 from fastNLP.core.vocabulary import VocabularyOption
-from fastNLP.io.base_loader import DataSetLoader, DataInfo
+from fastNLP.io.base_loader import DataSetLoader, DataBundle
 from typing import Union, Dict
 from fastNLP import DataSet
 from fastNLP import Vocabulary
@@ -76,7 +76,7 @@ class OntoNoteNERDataLoader(DataSetLoader):
         return dataset
 
     def process(self, paths: Union[str, Dict[str, str]], word_vocab_opt:VocabularyOption=None,
-                lower:bool=True)->DataInfo:
+                lower:bool=True)->DataBundle:
         """
         读取并处理数据。返回的DataInfo包含以下的内容
             vocabs:
@@ -96,7 +96,7 @@ class OntoNoteNERDataLoader(DataSetLoader):
         :return:
         """
         paths = check_dataloader_paths(paths)
-        data = DataInfo()
+        data = DataBundle()
         input_fields = [Const.TARGET, Const.INPUT, Const.INPUT_LEN]
         target_fields = [Const.TARGET, Const.INPUT_LEN]
         for name, path in paths.items():
diff --git a/reproduction/text_classification/data/IMDBLoader.py b/reproduction/text_classification/data/IMDBLoader.py
index 0cdab15e..d57ee41b 100644
--- a/reproduction/text_classification/data/IMDBLoader.py
+++ b/reproduction/text_classification/data/IMDBLoader.py
@@ -1,6 +1,6 @@
 from fastNLP.io.embed_loader import EmbeddingOption, EmbedLoader
 from fastNLP.core.vocabulary import VocabularyOption
-from fastNLP.io.base_loader import DataSetLoader, DataInfo
+from fastNLP.io.base_loader import DataSetLoader, DataBundle
 from typing import Union, Dict, List, Iterator
 from fastNLP import DataSet
 from fastNLP import Instance
@@ -50,7 +50,7 @@ class IMDBLoader(DataSetLoader):
                 char_level_op=False):
       
         datasets = {}
-        info = DataInfo()
+        info = DataBundle()
         for name, path in paths.items():
             dataset = self.load(path)
             datasets[name] = dataset
diff --git a/reproduction/text_classification/data/MTL16Loader.py b/reproduction/text_classification/data/MTL16Loader.py
index 066b53b4..68969069 100644
--- a/reproduction/text_classification/data/MTL16Loader.py
+++ b/reproduction/text_classification/data/MTL16Loader.py
@@ -1,6 +1,6 @@
 from fastNLP.io.embed_loader import EmbeddingOption, EmbedLoader
 from fastNLP.core.vocabulary import VocabularyOption
-from fastNLP.io.base_loader import DataSetLoader, DataInfo
+from fastNLP.io.base_loader import DataSetLoader, DataBundle
 from typing import Union, Dict, List, Iterator
 from fastNLP import DataSet
 from fastNLP import Instance
@@ -47,7 +47,7 @@ class MTL16Loader(DataSetLoader):
         
         paths = check_dataloader_paths(paths)
         datasets = {}
-        info = DataInfo()
+        info = DataBundle()
         for name, path in paths.items():
             dataset = self.load(path)
             datasets[name] = dataset
diff --git a/reproduction/text_classification/data/sstloader.py b/reproduction/text_classification/data/sstloader.py
index 97cd935e..fa4d1837 100644
--- a/reproduction/text_classification/data/sstloader.py
+++ b/reproduction/text_classification/data/sstloader.py
@@ -1,6 +1,6 @@
 from typing import Iterable
 from nltk import Tree
-from fastNLP.io.base_loader import DataInfo, DataSetLoader
+from fastNLP.io.base_loader import DataBundle, DataSetLoader
 from fastNLP.core.vocabulary import VocabularyOption, Vocabulary
 from fastNLP import DataSet
 from fastNLP import Instance
@@ -68,7 +68,7 @@ class SSTLoader(DataSetLoader):
         tgt_vocab = Vocabulary(unknown=None, padding=None) \
             if tgt_vocab_op is None else Vocabulary(**tgt_vocab_op)
 
-        info = DataInfo(datasets=self.load(paths))
+        info = DataBundle(datasets=self.load(paths))
         _train_ds = [info.datasets[name]
                      for name in train_ds] if train_ds else info.datasets.values()
         src_vocab.from_dataset(*_train_ds, field_name=input_name)
@@ -134,7 +134,7 @@ class sst2Loader(DataSetLoader):
 
         paths = check_dataloader_paths(paths)
         datasets = {}
-        info = DataInfo()
+        info = DataBundle()
         for name, path in paths.items():
             dataset = self.load(path)
             datasets[name] = dataset
diff --git a/reproduction/text_classification/data/yelpLoader.py b/reproduction/text_classification/data/yelpLoader.py
index f34cfbbf..04ae94f9 100644
--- a/reproduction/text_classification/data/yelpLoader.py
+++ b/reproduction/text_classification/data/yelpLoader.py
@@ -4,7 +4,7 @@ from typing import Iterable
 from fastNLP import DataSet, Instance, Vocabulary
 from fastNLP.core.vocabulary import VocabularyOption
 from fastNLP.io import JsonLoader
-from fastNLP.io.base_loader import DataInfo,DataSetLoader
+from fastNLP.io.base_loader import DataBundle,DataSetLoader
 from fastNLP.io.embed_loader import EmbeddingOption
 from fastNLP.io.file_reader import _read_json
 from typing import Union, Dict
@@ -134,7 +134,7 @@ class yelpLoader(DataSetLoader):
                 char_level_op=False):
         paths = check_dataloader_paths(paths)
         datasets = {}
-        info = DataInfo(datasets=self.load(paths))
+        info = DataBundle(datasets=self.load(paths))
         src_vocab = Vocabulary() if src_vocab_op is None else Vocabulary(**src_vocab_op)
         tgt_vocab = Vocabulary(unknown=None, padding=None) \
             if tgt_vocab_op is None else Vocabulary(**tgt_vocab_op)