diff --git a/EduNLP/SIF/parser/parser.py b/EduNLP/SIF/parser/parser.py
index b5ed272d..db290946 100644
--- a/EduNLP/SIF/parser/parser.py
+++ b/EduNLP/SIF/parser/parser.py
@@ -226,16 +226,7 @@ def get_token(self):
                     print("Warning: there is some chinese characters in formula!")
                     self.warnning = 1
                     flag = 0
-                    self.head += 1
-                elif flag and ch_informula == '\n':
-                    # latex 中出现换行符，删除且打印一次 warning
-                    print("Warning: there is a '\\n' in formula!")
-                    self.warnning = 1
-                    flag = 0
-                    self.text = self.text[:self.head] + self.text[self.head + 1:]
-                    self.modify_flag = 1
-                else:
-                    self.head += 1
+                self.head += 1
             if self.head >= len(self.text):
                 self.call_error()
                 return self.error
@@ -333,10 +324,6 @@ def description_list(self):
         >>> text_parser.description_list()
         >>> text_parser.fomula_illegal_flag
         1
-        >>> text = '方程$x+y=2\n$'
-        >>> text_parser = Parser(text)
-        >>> text_parser.description_list()
-        Warning: there is a '\n' in formula!
         """
         # print('call description_list')
         self.description()
diff --git a/tests/test_sif/test_parser.py b/tests/test_sif/test_parser.py
index 1d75c533..34f996d2 100644
--- a/tests/test_sif/test_parser.py
+++ b/tests/test_sif/test_parser.py
@@ -34,7 +34,3 @@ def test_parser():
     text_parser = Parser(text)
     text_parser.description_list()
     assert text_parser.fomula_illegal_flag == 1
-
-    text = '方程$x+y=2\n$'
-    text_parser = Parser(text)
-    text_parser.description_list()