diff --git a/autoload/SpaceVim/layers/autocomplete.vim b/autoload/SpaceVim/layers/autocomplete.vim
index 31818e3ee..e03bf6e97 100644
--- a/autoload/SpaceVim/layers/autocomplete.vim
+++ b/autoload/SpaceVim/layers/autocomplete.vim
@@ -118,6 +118,7 @@ function! SpaceVim#layers#autocomplete#config() abort
   if s:tab_key_behavior ==# 'smart'
     if has('patch-7.4.774')
       imap <silent><expr><TAB> SpaceVim#mapping#tab()
+      imap <silent><expr><S-TAB> SpaceVim#mapping#shift_tab()
       if g:spacevim_snippet_engine ==# 'neosnippet'
         smap <expr><TAB>
               \ neosnippet#expandable_or_jumpable() ?
@@ -125,18 +126,14 @@ function! SpaceVim#layers#autocomplete#config() abort
               \ (complete_parameter#jumpable(1) ?
               \ "\<plug>(complete_parameter#goto_next_parameter)" :
               \ "\<TAB>")
-        imap <silent><expr><S-TAB> SpaceVim#mapping#shift_tab()
       elseif g:spacevim_snippet_engine ==# 'ultisnips'
-        imap <silent><expr><TAB> SpaceVim#mapping#tab()
-        imap <silent><expr><S-TAB> SpaceVim#mapping#shift_tab()
         snoremap <silent> <TAB>
               \ <ESC>:call UltiSnips#JumpForwards()<CR>
         snoremap <silent> <S-TAB>
               \ <ESC>:call UltiSnips#JumpBackwards()<CR>
-      else
       endif
     else
-      call SpaceVim#logger#warn('smart tab in autocomplete layer need patch 7.4.774')
+      call SpaceVim#logger#info('smart tab in autocomplete layer need patch 7.4.774')
     endif
   elseif s:tab_key_behavior ==# 'complete'
     inoremap <expr> <Tab>       pumvisible() ? "\<C-y>" : "\<C-n>"
@@ -157,9 +154,14 @@ function! SpaceVim#layers#autocomplete#config() abort
   inoremap <expr> <PageDown> pumvisible() ? "\<PageDown>\<C-p>\<C-n>" : "\<PageDown>"
   inoremap <expr> <PageUp>   pumvisible() ? "\<PageUp>\<C-p>\<C-n>" : "\<PageUp>"
   " in origin vim or neovim Alt + / will insert a /, this should be disabled.
-  imap <expr> <M-/>
-        \ neosnippet#expandable() ?
-        \ "\<Plug>(neosnippet_expand)" : ""
+  let g:complete_parameter_use_ultisnips_mapping = 1
+  if g:spacevim_snippet_engine ==# 'neosnippet'
+    imap <expr> <M-/>
+          \ neosnippet#expandable() ?
+          \ "\<Plug>(neosnippet_expand)" : ""
+  elseif g:spacevim_snippet_engine ==# 'ultisnips'
+    inoremap <silent> <M-/> <C-R>=UltiSnips#ExpandSnippetOrJump()<cr>
+  endif
 
   let g:_spacevim_mappings_space.i = {'name' : '+Insertion'}
   if g:spacevim_snippet_engine ==# 'neosnippet'
diff --git a/config/plugins_before/ultisnips.vim b/config/plugins_before/ultisnips.vim
index c31149706..d4ba1c085 100644
--- a/config/plugins_before/ultisnips.vim
+++ b/config/plugins_before/ultisnips.vim
@@ -1,6 +1,6 @@
 " If you want :UltiSnipsEdit to split your window.
-let g:UltiSnipsEditSplit="vertical"
-let g:UltiSnipsExpandTrigger='<Nop>'
-let g:UltiSnipsJumpBackwardTrigger='<Nop>'
-let g:UltiSnipsJumpForwardTrigger='<Nop>'
+let g:UltiSnipsEditSplit = 'vertical'
+let g:UltiSnipsExpandTrigger = get(g:, 'UltiSnipsExpandTrigger', '<C-j>')
+let g:UltiSnipsJumpBackwardTrigger = get(g:, 'UltiSnipsJumpBackwardTrigger', '<C-j>')
+let g:UltiSnipsJumpForwardTrigger = get(g:, 'UltiSnipsJumpForwardTrigger', '<C-j>')
 let g:UltiSnipsSnippetsDir = '~/.SpaceVim.d/UltiSnips'