diff --git a/MarkdownBuildClass.py b/MarkdownBuildClass.py
index fda077f..f785b1d 100644
--- a/MarkdownBuildClass.py
+++ b/MarkdownBuildClass.py
@@ -1,7 +1,7 @@
 # -*- coding:utf-8 -*-
 class MarkDownBuild:
 
-    table_header = '|字段名称|字段类型|字段含义|\n|:--:|:--:|:--:|\n'
+    table_header = '|字段名称|字段类型|字段含义|\n|:---:|:---:|:---:|\n'
     table_content_template = '|%s|%s|%s|\n'
 
     def __init__(self):
@@ -15,4 +15,4 @@ class MarkDownBuild:
             for column in table[1]:
                 text = text + '|' + column[0] + '|' + column[1] + '|' + column[2] + '|\n'
             text += '\n'
-        return text
\ No newline at end of file
+        return text