按照 snipmate 的文档，修改 trigger key 要改动 snipmate.vim/after/plugin/snipMate.vim 文件

例如将改为可以将下面两行

" You can safely adjust these mappings to your preferences (as explained in
" :help snipMate-remap).
ino <silent> <tab> <c-r>=TriggerSnippet()<cr>
snor <silent> <tab> <esc>i<right><c-r>=TriggerSnippet()<cr>

改为

ino <silent> <C-\> <c-r>=TriggerSnippet()<cr>
snor <silent> <C-\> <esc>i<right><c-r>=TriggerSnippet()<cr>

在 Mac OSX 上测试可以使用 虽然已经一年了，还是希望能帮上忙吧