diff --git a/autoload/SpaceVim/layers/lang/ocaml.vim b/autoload/SpaceVim/layers/lang/ocaml.vim
index 5824ab86f..8f9875bac 100644
--- a/autoload/SpaceVim/layers/lang/ocaml.vim
+++ b/autoload/SpaceVim/layers/lang/ocaml.vim
@@ -29,4 +29,29 @@ endfunction
 
 function! SpaceVim#layers#lang#ocaml#config() abort
     let g:syntastic_ocaml_checkers = ['merlin']
+
+    " https://github.com/ocaml/merlin/blob/master/vim/merlin/doc/merlin.txt#L333-L341
+    if g:spacevim_autocomplete_method ==# 'neocomplete'
+        if !exists('g:neocomplete#sources#omni#input_patterns')
+            let g:neocomplete#sources#omni#input_patterns = {}
+        endif
+        let g:neocomplete#sources#omni#input_patterns.ocaml = '[^. *\t]\.\w*\|\h\w*|#'
+    endif
+
+    call SpaceVim#mapping#gd#add('ocaml', function('s:go_to_def'))
+    call SpaceVim#mapping#space#regesit_lang_mappings('ocaml', function('s:language_specified_mappings'))
+endfunction
+
+function! s:language_specified_mappings() abort
+    let g:_spacevim_mappings_space.l.m = {'name' : '+Merlin'}
+    call SpaceVim#mapping#space#langSPC('nmap', ['l','m', 'v'],
+          \ 'MerlinVersion',
+          \ 'show Merlin version', 1)
+    call SpaceVim#mapping#space#langSPC('nmap', ['l','m', 't'],
+          \ 'MerlinTypeOf',
+          \ 'extract type informations', 1)
+endfunction
+
+function! s:go_to_def() abort
+    :MerlinLocate
 endfunction
diff --git a/docs/cn/layers/lang/ocaml.md b/docs/cn/layers/lang/ocaml.md
index 43f5ee681..b30dfc1e8 100644
--- a/docs/cn/layers/lang/ocaml.md
+++ b/docs/cn/layers/lang/ocaml.md
@@ -24,6 +24,8 @@ lang: zh
 - 语法高亮
 - 代码补全
 - 跳转定义处
+- 类型提示
+- 检查 `Merlin` 版本
 
 ## 启用模块
 
@@ -36,6 +38,9 @@ lang: zh
 
 ## 快捷键
 
-| 快捷键 | 功能描述                 |
-| ----   | ------------------------ |
-| `gd`   | 跳转到光标下符号的定义处 |
+| 快捷键      | 功能描述                       |
+| ----------- | ------------------------------ |
+| `gd`        | 跳转到光标下符号的定义处       |
+| `SPC l m v` | 显示当前使用的 `Merlin` 版本号 |
+| `SPC l m t` | 显示光标下或者选中代码块的类型 |
+
diff --git a/docs/layers/lang/ocaml.md b/docs/layers/lang/ocaml.md
index 04e0d03d2..b6ef9ee19 100644
--- a/docs/layers/lang/ocaml.md
+++ b/docs/layers/lang/ocaml.md
@@ -34,9 +34,13 @@ To use this configuration layer, update custom configuration file with:
 - auto-completion
 - syntax checking
 - goto definition
+- type hint
+- check `Merlin` version
 
 ## Key bindings
 
-| Key Binding | Description                                               |
-| ----------- | --------------------------------------------------------- |
-| `gd`        | jump at the definition of the identifier under the cursor |
+| Key Binding | Description                                                         |
+| ----------- | ------------------------------------------------------------------- |
+| `gd`        | jump at the definition of the identifier under the cursor           |
+| `SPC l m v` | display `Merlin` version which currently labored                    |
+| `SPC l m t` | display type informations under the cursor or selected code snippet |