打开TortoiseSVN的Setting，选择左边的Diff Viewer

设置如下：

"D:\Program Files\Beyond Compare 4\BComp.exe" %base %mine /title1=%bname /title2=%yname /leftreadonly

和　　

"D:\Program Files\Beyond Compare 4\BComp.exe" 　
其中D:\Program Files\Beyond Compare 4\BComp.exe 为Beyond Compare 4的安装路径

　　

如下图

TortoiseSVN比较工具设置为BeyondCompare 4_编程

 

Merge Tool设置下

TortoiseSVN比较工具设置为BeyondCompare 4_svn_02

"D:\Program Files\Beyond Compare 4\BCompare.exe" %mine %theirs %base %merged /title1=%yname /title2=%tname /title3=%bname /title4=%mname