diff --git a/autoload/SpaceVim/mapping.vim b/autoload/SpaceVim/mapping.vim
index 37a22081b..e480a5ddb 100644
--- a/autoload/SpaceVim/mapping.vim
+++ b/autoload/SpaceVim/mapping.vim
@@ -91,6 +91,9 @@ endfunction
 
 if get(g:, 'spacevim_snippet_engine', 'neosnippet') ==# 'neosnippet'
   function! SpaceVim#mapping#shift_tab() abort
+    if g:spacevim_autocomplete_method ==# 'coc' && coc#pum#visible()
+      return coc#pum#prev(1)
+    endif
     return pumvisible() ? "\<C-p>" : "\<Plug>delimitMateS-Tab"
   endfunction
 elseif get(g:, 'spacevim_snippet_engine', 'neosnippet') ==# 'ultisnips'
diff --git a/autoload/SpaceVim/mapping/tab.vim b/autoload/SpaceVim/mapping/tab.vim
index 4333f5125..03afcdff9 100644
--- a/autoload/SpaceVim/mapping/tab.vim
+++ b/autoload/SpaceVim/mapping/tab.vim
@@ -26,6 +26,8 @@ if g:spacevim_snippet_engine ==# 'neosnippet'
           \   && luaeval("require('cmp').visible()")
           \ )
       return "\<C-n>"
+    elseif g:spacevim_autocomplete_method ==# 'coc' && coc#pum#visible()
+      return coc#pum#next(1)
     elseif has('patch-7.4.774')
           \ && g:spacevim_autocomplete_method !=# 'nvim-cmp'
           \ && complete_parameter#jumpable(1)