diff --git a/autoload/SpaceVim/layers/autocomplete.vim b/autoload/SpaceVim/layers/autocomplete.vim
index 802446238..ab7798b3c 100644
--- a/autoload/SpaceVim/layers/autocomplete.vim
+++ b/autoload/SpaceVim/layers/autocomplete.vim
@@ -110,13 +110,19 @@ 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()
-      smap <expr><TAB>
-            \ neosnippet#expandable_or_jumpable() ?
-            \ "\<Plug>(neosnippet_expand_or_jump)" :
-            \ (complete_parameter#jumpable(1) ?
-            \ "\<plug>(complete_parameter#goto_next_parameter)" :
-            \ "\<TAB>")
-      imap <silent><expr><S-TAB> SpaceVim#mapping#shift_tab()
+      if g:spacevim_snippet_engine ==# 'neosnippet'
+        smap <expr><TAB>
+              \ neosnippet#expandable_or_jumpable() ?
+              \ "\<Plug>(neosnippet_expand_or_jump)" :
+              \ (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()
+      else
+      endif
     else
       call SpaceVim#logger#warn('smart tab in autocomplete layer need patch 7.4.774')
     endif
diff --git a/autoload/SpaceVim/mapping.vim b/autoload/SpaceVim/mapping.vim
index f64b91d61..0d7e49978 100644
--- a/autoload/SpaceVim/mapping.vim
+++ b/autoload/SpaceVim/mapping.vim
@@ -79,9 +79,15 @@ function! SpaceVim#mapping#def(type, key, value, ...) abort
   endif
 endfunction
 
-function! SpaceVim#mapping#shift_tab() abort
-  return pumvisible() ? "\<C-p>" : "\<Plug>delimitMateS-Tab"
-endfunction
+if g:spacevim_snippet_engine ==# 'neosnippet'
+  function! SpaceVim#mapping#shift_tab() abort
+    return pumvisible() ? "\<C-p>" : "\<Plug>delimitMateS-Tab"
+  endfunction
+elseif g:spacevim_snippet_engine ==# 'ultisnips'
+  function! SpaceVim#mapping#shift_tab() abort
+    return pumvisible() ? "\<C-p>" : "\<C-R>=UltiSnips#JumpForwards()\<CR>\<C-R>=cmp#ultisnips#JumpForward()\<CR>"
+  endfunction
+endif
 
 function! SpaceVim#mapping#tab() abort
   return SpaceVim#mapping#tab#i_tab()
diff --git a/autoload/SpaceVim/mapping/tab.vim b/autoload/SpaceVim/mapping/tab.vim
index cd3112099..7d7bbb3d2 100644
--- a/autoload/SpaceVim/mapping/tab.vim
+++ b/autoload/SpaceVim/mapping/tab.vim
@@ -20,9 +20,23 @@ if g:spacevim_snippet_engine ==# 'neosnippet'
     endif
   endfunction
 elseif g:spacevim_snippet_engine ==# 'ultisnips'
+  function! SpaceVim#mapping#tab#expandable()
+    let snippet = UltiSnips#ExpandSnippetOrJump()
+    if g:ulti_expand_or_jump_res > 0
+      return snippet
+    elseif pumvisible()
+      return "\<C-n>"
+    else
+      return "\<TAB>"
+    endif
+  endfunction
   function! SpaceVim#mapping#tab#i_tab() abort
-    return "\<tab>"
+    if getline('.')[col('.')-2] ==# '{'&& pumvisible()
+      return "\<C-n>"
+    endif
+    return "\<C-R>=SpaceVim#mapping#tab#expandable()\<cr>"
   endfunction
 endif
 
+
 " vim:set et sw=2 cc=80:
diff --git a/config/plugins_before/ultisnips.vim b/config/plugins_before/ultisnips.vim
index 74dfcb0f1..c31149706 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='<tab>'
-let g:UltiSnipsJumpBackwardTrigger="<c-z>"
-let g:UltiSnipsJumpForwardTrigger='<tab>'
+let g:UltiSnipsExpandTrigger='<Nop>'
+let g:UltiSnipsJumpBackwardTrigger='<Nop>'
+let g:UltiSnipsJumpForwardTrigger='<Nop>'
 let g:UltiSnipsSnippetsDir = '~/.SpaceVim.d/UltiSnips'