diff --git a/工具v2/database_tools.py b/工具v2/database_tools.py
index 6de58c4d..3cf13288 100644
--- a/工具v2/database_tools.py
+++ b/工具v2/database_tools.py
@@ -1397,6 +1397,7 @@ def RefineMathpix(raw_string): # 进一步修改mathpix得到的字符串
     string = RefineCasesEnv(string) #美化cases环境
     string = RefineChineseComma(string) #改顿号
     string = RefineInterval(string) #改错误的dollars符号和括号的顺序
+    string = string.replace("$$"," ")
     
 
     return string