在~/目录下创建.gvimrc文件，就好了，内容如下。
引用:set fileencodings=utf-8,cp936,big5,latin1
"an 20.4109 &Edit.-SEP6-
an 20.4109.10 &Edit.Encoding.&GBK :set encoding=gbk
an 20.4109.11 &Edit.Encoding.&Big5 :set encoding=big5
an 20.4109.12 &Edit.Encoding.&UTF-8 :set encoding=utf-8
an 20.4119.10 &Edit.Fileencodings.&GBK :set fileencodings=gbk
an 20.4119.11 &Edit.Fileencodings.&Big5 :set fileencodings=big5
an 20.4119.12 &Edit.Fileencodings.&UTF-8 :set fileencodings=utf-8
an 20.4139 &Edit.gb convert.gb->big5 :%!autogb -i gb -o big5
an 20.4139 &Edit.gb convert.gb->utf8 :%!autogb -i gb -o utf8
an 20.4149 &Edit.big5 convert.big5->gb :%!autogb -i big5 -o gb
an 20.4149 &Edit.big5 convert.big5->utf8 :%!autogb -i big5 -o utf8
an 20.4159 &Edit.utf8 convert.utf8->gb :%!autogb -i utf8 -o gb
an 20.4159 &Edit.utf8 convert.utf8->big5 :%!autogb -i utf8 -o big5/