diff --git a/fastNLP/io/dataset_loader.py b/fastNLP/io/dataset_loader.py
index 641a631e..76b9584d 100644
--- a/fastNLP/io/dataset_loader.py
+++ b/fastNLP/io/dataset_loader.py
@@ -417,6 +417,55 @@ class PeopleDailyCorpusLoader(DataSetLoader):
         data_set.set_input("seq_len")
         return data_set
 
+    
+class Conll2003Loader(DataSetLoader):
+    """Self-defined loader of conll2003 dataset
+    
+        More information about the given dataset cound be found on 
+        https://sites.google.com/site/ermasoftware/getting-started/ne-tagging-conll2003-data 
+    
+    """
+    
+    def __init__(self):
+        super(Conll2003Loader, self).__init__()
+        
+    def load(self, dataset_path):
+        with open(dataset_path, "r", encoding="utf-8") as f:
+            lines = f.readlines()
+        
+        ##Parse the dataset line by line
+        parsed_data = []
+        sentence = []
+        tokens = []
+        for line in lines:
+            if '-DOCSTART- -X- -X- O' in line or line == '\n':
+                if sentence != []:
+                    parsed_data.append((sentence, tokens))
+                    sentence = []
+                    tokens = []
+                continue
+                
+            temp = line.strip().split(" ")
+            sentence.append(temp[0]) 
+            tokens.append(temp[1:4])
+                           
+        return self.convert(parsed_data)
+            
+    def convert(self, parsed_data):
+        dataset = DataSet()
+        for sample in parsed_data:
+            label0_list = list(map(
+                lambda labels: labels[0], sample[1]))
+            label1_list = list(map(
+                lambda labels: labels[1], sample[1]))
+            label2_list = list(map(
+                lambda labels: labels[2], sample[1]))
+            dataset.append(Instance(token_list=sample[0], 
+                                    label0_list=label0_list, 
+                                    label1_list=label1_list,
+                                    label2_list=label2_list))
+            
+        return dataset
 
 class SNLIDataSetLoader(DataSetLoader):
     """A data set loader for SNLI data set.
diff --git a/test/data_for_tests/conll_2003_example.txt b/test/data_for_tests/conll_2003_example.txt
new file mode 100644
index 00000000..d11a8264
--- /dev/null
+++ b/test/data_for_tests/conll_2003_example.txt
@@ -0,0 +1,442 @@
+-DOCSTART- -X- -X- O
+
+SOCCER NN B-NP O
+- : O O
+JAPAN NNP B-NP B-LOC
+GET VB B-VP O
+LUCKY NNP B-NP O
+WIN NNP I-NP O
+, , O O
+CHINA NNP B-NP B-PER
+IN IN B-PP O
+SURPRISE DT B-NP O
+DEFEAT NN I-NP O
+. . O O
+
+Nadim NNP B-NP B-PER
+Ladki NNP I-NP I-PER
+
+AL-AIN NNP B-NP B-LOC
+, , O O
+United NNP B-NP B-LOC
+Arab NNP I-NP I-LOC
+Emirates NNPS I-NP I-LOC
+1996-12-06 CD I-NP O
+
+Japan NNP B-NP B-LOC
+began VBD B-VP O
+the DT B-NP O
+defence NN I-NP O
+of IN B-PP O
+their PRP$ B-NP O
+Asian JJ I-NP B-MISC
+Cup NNP I-NP I-MISC
+title NN I-NP O
+with IN B-PP O
+a DT B-NP O
+lucky JJ I-NP O
+2-1 CD I-NP O
+win VBP B-VP O
+against IN B-PP O
+Syria NNP B-NP B-LOC
+in IN B-PP O
+a DT B-NP O
+Group NNP I-NP O
+C NNP I-NP O
+championship NN I-NP O
+match NN I-NP O
+on IN B-PP O
+Friday NNP B-NP O
+. . O O
+
+But CC O O
+China NNP B-NP B-LOC
+saw VBD B-VP O
+their PRP$ B-NP O
+luck NN I-NP O
+desert VB B-VP O
+them PRP B-NP O
+in IN B-PP O
+the DT B-NP O
+second NN I-NP O
+match NN I-NP O
+of IN B-PP O
+the DT B-NP O
+group NN I-NP O
+, , O O
+crashing VBG B-VP O
+to TO B-PP O
+a DT B-NP O
+surprise NN I-NP O
+2-0 CD I-NP O
+defeat NN I-NP O
+to TO B-PP O
+newcomers NNS B-NP O
+Uzbekistan NNP I-NP B-LOC
+. . O O
+
+China NNP B-NP B-LOC
+controlled VBD B-VP O
+most JJS B-NP O
+of IN B-PP O
+the DT B-NP O
+match NN I-NP O
+and CC O O
+saw VBD B-VP O
+several JJ B-NP O
+chances NNS I-NP O
+missed VBD B-VP O
+until IN B-SBAR O
+the DT B-NP O
+78th JJ I-NP O
+minute NN I-NP O
+when WRB B-ADVP O
+Uzbek NNP B-NP B-MISC
+striker NN I-NP O
+Igor JJ B-NP B-PER
+Shkvyrin NNP I-NP I-PER
+took VBD B-VP O
+advantage NN B-NP O
+of IN B-PP O
+a DT B-NP O
+misdirected JJ I-NP O
+defensive JJ I-NP O
+header NN I-NP O
+to TO B-VP O
+lob VB I-VP O
+the DT B-NP O
+ball NN I-NP O
+over IN B-PP O
+the DT B-NP O
+advancing VBG I-NP O
+Chinese JJ I-NP B-MISC
+keeper NN I-NP O
+and CC O O
+into IN B-PP O
+an DT B-NP O
+empty JJ I-NP O
+net NN I-NP O
+. . O O
+
+Oleg NNP B-NP B-PER
+Shatskiku NNP I-NP I-PER
+made VBD B-VP O
+sure JJ B-ADJP O
+of IN B-PP O
+the DT B-NP O
+win VBP B-VP O
+in IN B-PP O
+injury NN B-NP O
+time NN I-NP O
+, , O O
+hitting VBG B-VP O
+an DT B-NP O
+unstoppable JJ I-NP O
+left VBD B-VP O
+foot NN B-NP O
+shot NN I-NP O
+from IN B-PP O
+just RB B-NP O
+outside IN B-PP O
+the DT B-NP O
+area NN I-NP O
+. . O O
+
+The DT B-NP O
+former JJ I-NP O
+Soviet JJ I-NP B-MISC
+republic NN I-NP O
+was VBD B-VP O
+playing VBG I-VP O
+in IN B-PP O
+an DT B-NP O
+Asian NNP I-NP B-MISC
+Cup NNP I-NP I-MISC
+finals NNS I-NP O
+tie NN I-NP O
+for IN B-PP O
+the DT B-NP O
+first JJ I-NP O
+time NN I-NP O
+. . O O
+
+Despite IN B-PP O
+winning VBG B-VP O
+the DT B-NP O
+Asian JJ I-NP B-MISC
+Games NNPS I-NP I-MISC
+title NN I-NP O
+two CD B-NP O
+years NNS I-NP O
+ago RB B-ADVP O
+, , O O
+Uzbekistan NNP B-NP B-LOC
+are VBP B-VP O
+in IN B-PP O
+the DT B-NP O
+finals NNS I-NP O
+as IN B-SBAR O
+outsiders NNS B-NP O
+. . O O
+
+Two CD B-NP O
+goals NNS I-NP O
+from IN B-PP O
+defensive JJ B-NP O
+errors NNS I-NP O
+in IN B-PP O
+the DT B-NP O
+last JJ I-NP O
+six CD I-NP O
+minutes NNS I-NP O
+allowed VBD B-VP O
+Japan NNP B-NP B-LOC
+to TO B-VP O
+come VB I-VP O
+from IN B-PP O
+behind NN B-NP O
+and CC O O
+collect VB B-VP O
+all DT B-NP O
+three CD I-NP O
+points NNS I-NP O
+from IN B-PP O
+their PRP$ B-NP O
+opening NN I-NP O
+meeting NN I-NP O
+against IN B-PP O
+Syria NNP B-NP B-LOC
+. . O O
+
+Takuya NNP B-NP B-PER
+Takagi NNP I-NP I-PER
+scored VBD B-VP O
+the DT B-NP O
+winner NN I-NP O
+in IN B-PP O
+the DT B-NP O
+88th JJ I-NP O
+minute NN I-NP O
+, , O O
+rising VBG B-VP O
+to TO I-VP O
+head VB I-VP O
+a DT B-NP O
+Hiroshige NNP I-NP B-PER
+Yanagimoto NNP I-NP I-PER
+cross VB B-VP O
+towards IN B-PP O
+the DT B-NP O
+Syrian JJ I-NP B-MISC
+goal NN I-NP O
+which WDT B-NP O
+goalkeeper VBD B-VP O
+Salem NNP B-NP B-PER
+Bitar NNP I-NP I-PER
+appeared VBD B-VP O
+to TO I-VP O
+have VB I-VP O
+covered VBN I-VP O
+but CC O O
+then RB B-VP O
+allowed VBN I-VP O
+to TO I-VP O
+slip VB I-VP O
+into IN B-PP O
+the DT B-NP O
+net NN I-NP O
+. . O O
+
+It PRP B-NP O
+was VBD B-VP O
+the DT B-NP O
+second JJ I-NP O
+costly JJ I-NP O
+blunder NN I-NP O
+by IN B-PP O
+Syria NNP B-NP B-LOC
+in IN B-PP O
+four CD B-NP O
+minutes NNS I-NP O
+. . O O
+
+Defender NNP B-NP O
+Hassan NNP I-NP B-PER
+Abbas NNP I-NP I-PER
+rose VBD B-VP O
+to TO I-VP O
+intercept VB I-VP O
+a DT B-NP O
+long JJ I-NP O
+ball NN I-NP O
+into IN B-PP O
+the DT B-NP O
+area NN I-NP O
+in IN B-PP O
+the DT B-NP O
+84th JJ I-NP O
+minute NN I-NP O
+but CC O O
+only RB B-ADVP O
+managed VBD B-VP O
+to TO I-VP O
+divert VB I-VP O
+it PRP B-NP O
+into IN B-PP O
+the DT B-NP O
+top JJ I-NP O
+corner NN I-NP O
+of IN B-PP O
+Bitar NN B-NP B-PER
+'s POS B-NP O
+goal NN I-NP O
+. . O O
+
+Nader NNP B-NP B-PER
+Jokhadar NNP I-NP I-PER
+had VBD B-VP O
+given VBN I-VP O
+Syria NNP B-NP B-LOC
+the DT B-NP O
+lead NN I-NP O
+with IN B-PP O
+a DT B-NP O
+well-struck NN I-NP O
+header NN I-NP O
+in IN B-PP O
+the DT B-NP O
+seventh JJ I-NP O
+minute NN I-NP O
+. . O O
+
+Japan NNP B-NP B-LOC
+then RB B-ADVP O
+laid VBD B-VP O
+siege NN B-NP O
+to TO B-PP O
+the DT B-NP O
+Syrian JJ I-NP B-MISC
+penalty NN I-NP O
+area NN I-NP O
+for IN B-PP O
+most JJS B-NP O
+of IN B-PP O
+the DT B-NP O
+game NN I-NP O
+but CC O O
+rarely RB B-VP O
+breached VBD I-VP O
+the DT B-NP O
+Syrian JJ I-NP B-MISC
+defence NN I-NP O
+. . O O
+
+Bitar NN B-NP B-PER
+pulled VBD B-VP O
+off RP B-PRT O
+fine JJ B-NP O
+saves VBZ B-VP O
+whenever WRB B-ADVP O
+they PRP B-NP O
+did VBD B-VP O
+. . O O
+
+Japan NNP B-NP B-LOC
+coach NN I-NP O
+Shu NNP I-NP B-PER
+Kamo NNP I-NP I-PER
+said VBD B-VP O
+: : O O
+' '' O O
+' POS B-NP O
+The DT I-NP O
+Syrian JJ I-NP B-MISC
+own JJ I-NP O
+goal NN I-NP O
+proved VBD B-VP O
+lucky JJ B-ADJP O
+for IN B-PP O
+us PRP B-NP O
+. . O O
+
+The DT B-NP O
+Syrians NNPS I-NP B-MISC
+scored VBD B-VP O
+early JJ B-NP O
+and CC O O
+then RB B-VP O
+played VBN I-VP O
+defensively RB B-ADVP O
+and CC O O
+adopted VBD B-VP O
+long RB I-VP O
+balls VBZ I-VP O
+which WDT B-NP O
+made VBD B-VP O
+it PRP B-NP O
+hard JJ B-ADJP O
+for IN B-PP O
+us PRP B-NP O
+. . O O
+' '' O O
+
+' '' O O
+
+Japan NNP B-NP B-LOC
+, , O O
+co-hosts VBZ B-VP O
+of IN B-PP O
+the DT B-NP O
+World NNP I-NP B-MISC
+Cup NNP I-NP I-MISC
+in IN B-PP O
+2002 CD B-NP O
+and CC O O
+ranked VBD B-VP O
+20th JJ B-NP O
+in IN B-PP O
+the DT B-NP O
+world NN I-NP O
+by IN B-PP O
+FIFA NNP B-NP B-ORG
+, , O O
+are VBP B-VP O
+favourites JJ B-ADJP O
+to TO B-VP O
+regain VB I-VP O
+their PRP$ B-NP O
+title NN I-NP O
+here RB B-ADVP O
+. . O O
+
+Hosts NNPS B-NP O
+UAE NNP I-NP B-LOC
+play NN I-NP O
+Kuwait NNP I-NP B-LOC
+and CC O O
+South NNP B-NP B-LOC
+Korea NNP I-NP I-LOC
+take VBP B-VP O
+on IN B-PP O
+Indonesia NNP B-NP B-LOC
+on IN B-PP O
+Saturday NNP B-NP O
+in IN B-PP O
+Group NNP B-NP O
+A NNP I-NP O
+matches VBZ B-VP O
+. . O O
+
+All DT B-NP O
+four CD I-NP O
+teams NNS I-NP O
+are VBP B-VP O
+level NN B-NP O
+with IN B-PP O
+one CD B-NP O
+point NN I-NP O
+each DT B-NP O
+from IN B-PP O
+one CD B-NP O
+game NN I-NP O
+. . O O
\ No newline at end of file
diff --git a/test/io/test_dataset_loader.py b/test/io/test_dataset_loader.py
new file mode 100644
index 00000000..9bee175b
--- /dev/null
+++ b/test/io/test_dataset_loader.py
@@ -0,0 +1,23 @@
+import os
+import unittest
+
+from fastNLP.io.dataset_loader import Conll2003Loader
+class TestDatasetLoader(unittest.TestCase):
+    
+    def test_case_1(self):
+        '''
+            Test the the loader of Conll2003 dataset
+        '''
+
+        dataset_path = "test/data_for_tests/conll_2003_example.txt"
+        loader = Conll2003Loader()
+        dataset_2003 = loader.load(dataset_path)
+        
+        for item in dataset_2003:
+            len0 = len(item["label0_list"])
+            len1 = len(item["label1_list"])
+            len2 = len(item["label2_list"])
+            lentoken = len(item["token_list"])
+            self.assertNotEqual(len0, 0)
+            self.assertEqual(len0, len1)
+            self.assertEqual(len1, len2)
\ No newline at end of file