diff --git a/docs/de-de/plugins.md b/docs/de-de/plugins.md
index f9ba36cc5..e1fb43e4c 100644
--- a/docs/de-de/plugins.md
+++ b/docs/de-de/plugins.md
@@ -35,7 +35,10 @@ Als Standardeinstellung werden Hyperlinks auf der aktuellen Seite erkannt und de
       noData: {
         '/de-de/': 'Keine Ergebnisse',
         '/': 'No Results'
-      }
+      },
+
+      // Headline depth, 1 - 6
+      depth: 2
     }
   }
 </script>
diff --git a/docs/plugins.md b/docs/plugins.md
index 225a684fa..1da767760 100644
--- a/docs/plugins.md
+++ b/docs/plugins.md
@@ -35,7 +35,10 @@ By default, the hyperlink on the current page is recognized and the content is s
       noData: {
         '/zh-cn/': '找不到结果',
         '/': 'No Results'
-      }
+      },
+
+      // Headline depth, 1 - 6
+      depth: 2
     }
   }
 </script>
diff --git a/docs/zh-cn/plugins.md b/docs/zh-cn/plugins.md
index 6e19cd469..4d8829b65 100644
--- a/docs/zh-cn/plugins.md
+++ b/docs/zh-cn/plugins.md
@@ -35,7 +35,10 @@
       noData: {
         '/zh-cn/': '找不到结果',
         '/': 'No Results'
-      }
+      },
+
+      // 搜索标题的最大程级, 1 - 6
+      depth: 2
     }
   }
 </script>
diff --git a/src/plugins/search/index.js b/src/plugins/search/index.js
index db3ca5756..66e5fba26 100644
--- a/src/plugins/search/index.js
+++ b/src/plugins/search/index.js
@@ -5,6 +5,7 @@ const CONFIG = {
   placeholder: 'Type to search',
   noData: 'No Results!',
   paths: 'auto',
+  depth: 2,
   maxAge: 86400000 // 1 day
 }
 
@@ -19,6 +20,7 @@ const install = function (hook, vm) {
     CONFIG.maxAge = util.isPrimitive(opts.maxAge) ? opts.maxAge : CONFIG.maxAge
     CONFIG.placeholder = opts.placeholder || CONFIG.placeholder
     CONFIG.noData = opts.noData || CONFIG.noData
+    CONFIG.depth = opts.depth || CONFIG.depth
   }
 
   const isAuto = CONFIG.paths === 'auto'
diff --git a/src/plugins/search/search.js b/src/plugins/search/search.js
index e8cbb5b9d..3615ea4ba 100644
--- a/src/plugins/search/search.js
+++ b/src/plugins/search/search.js
@@ -38,14 +38,14 @@ function saveData (maxAge) {
   localStorage.setItem('docsify.search.index', JSON.stringify(INDEXS))
 }
 
-export function genIndex (path, content = '', router) {
+export function genIndex (path, content = '', router, depth) {
   const tokens = window.marked.lexer(content)
   const slugify = window.Docsify.slugify
   const index = {}
   let slug
 
   tokens.forEach(token => {
-    if (token.type === 'heading' && token.depth <= 2) {
+    if (token.type === 'heading' && token.depth <= depth) {
       slug = router.toURL(path, { id: slugify(token.text) })
       index[slug] = { slug, title: token.text, body: '' }
     } else {
@@ -154,7 +154,7 @@ export function init (config, vm) {
     helper
       .get(vm.router.getFile(path))
       .then(result => {
-        INDEXS[path] = genIndex(path, result, vm.router)
+        INDEXS[path] = genIndex(path, result, vm.router, config.depth)
         len === ++count && saveData(config.maxAge)
       })
   })