diff --git a/docs/de-de/markdown.md b/docs/de-de/markdown.md
index 0a70b4d38..9d0e25083 100644
--- a/docs/de-de/markdown.md
+++ b/docs/de-de/markdown.md
@@ -28,3 +28,28 @@ window.$docsify = {
   }
 }
 ```
+
+
+## Supports mermaid
+
+```js
+// Import mermaid
+//  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.css">
+//  <script src="//cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js"></script>
+
+window.$docsify = {
+  markdown: {
+    renderer: {
+      code: function(code, lang) {
+        if (lang === "mermaid") {
+          return (
+            '<div class="mermaid">' + mermaid.render(lang, code) + "</div>"
+          );
+        }
+        return this.origin.code.apply(this, arguments);
+      }
+    }
+  }
+}
+```
+
diff --git a/docs/markdown.md b/docs/markdown.md
index a50411a3f..5f15608b5 100644
--- a/docs/markdown.md
+++ b/docs/markdown.md
@@ -28,3 +28,26 @@ window.$docsify = {
   }
 }
 ```
+
+## Supports mermaid
+
+```js
+// Import mermaid
+//  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.css">
+//  <script src="//cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js"></script>
+
+window.$docsify = {
+  markdown: {
+    renderer: {
+      code: function(code, lang) {
+        if (lang === "mermaid") {
+          return (
+            '<div class="mermaid">' + mermaid.render(lang, code) + "</div>"
+          );
+        }
+        return this.origin.code.apply(this, arguments);
+      }
+    }
+  }
+}
+```
diff --git a/docs/zh-cn/markdown.md b/docs/zh-cn/markdown.md
index a0028399d..3d13154d9 100644
--- a/docs/zh-cn/markdown.md
+++ b/docs/zh-cn/markdown.md
@@ -27,4 +27,28 @@ window.$docsify = {
     return marked
   }
 }
-```
\ No newline at end of file
+```
+
+
+## Supports mermaid
+
+```js
+// Import mermaid
+//  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.css">
+//  <script src="//cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js"></script>
+
+window.$docsify = {
+  markdown: {
+    renderer: {
+      code: function(code, lang) {
+        if (lang === "mermaid") {
+          return (
+            '<div class="mermaid">' + mermaid.render(lang, code) + "</div>"
+          );
+        }
+        return this.origin.code.apply(this, arguments);
+      }
+    }
+  }
+}
+```
diff --git a/src/core/render/compiler.js b/src/core/render/compiler.js
index 845af0432..9f04ebb66 100644
--- a/src/core/render/compiler.js
+++ b/src/core/render/compiler.js
@@ -61,11 +61,13 @@ export class Compiler {
     const renderer = new marked.Renderer()
     const { linkTarget, router, contentBase } = this
     const _self = this
+    const origin = {}
+
     /**
      * render anchor tag
      * @link https://github.com/chjj/marked#overriding-renderer-methods
      */
-    renderer.heading = function (text, level) {
+    origin.heading = renderer.heading = function (text, level) {
       const nextToc = { level, title: text }
 
       if (/{docsify-ignore}/g.test(text)) {
@@ -88,12 +90,12 @@ export class Compiler {
       return `<h${level} id="${slug}"><a href="${url}" data-id="${slug}" class="anchor"><span>${text}</span></a></h${level}>`
     }
     // highlight code
-    renderer.code = function (code, lang = '') {
+    origin.code = renderer.code = function (code, lang = '') {
       const hl = Prism.highlight(code, Prism.languages[lang] || Prism.languages.markup)
 
       return `<pre v-pre data-lang="${lang}"><code class="lang-${lang}">${hl}</code></pre>`
     }
-    renderer.link = function (href, title, text) {
+    origin.link = renderer.link = function (href, title, text) {
       let blank = ''
 
       if (!/:|(\/{2})/.test(href) &&
@@ -117,7 +119,7 @@ export class Compiler {
       }
       return `<a href="${href}"${title || ''}${blank}>${text}</a>`
     }
-    renderer.paragraph = function (text) {
+    origin.paragraph = renderer.paragraph = function (text) {
       if (/^!&gt;/.test(text)) {
         return helperTpl('tip', text)
       } else if (/^\?&gt;/.test(text)) {
@@ -125,7 +127,7 @@ export class Compiler {
       }
       return `<p>${text}</p>`
     }
-    renderer.image = function (href, title, text) {
+    origin.image = renderer.image = function (href, title, text) {
       let url = href
       const titleHTML = title ? ` title="${title}"` : ''
 
@@ -136,6 +138,8 @@ export class Compiler {
       return `<img src="${url}" data-origin="${href}" alt="${text}"${titleHTML}>`
     }
 
+    renderer.origin = origin
+
     return renderer
   }