diff --git a/help/FEATURES.md b/help/FEATURES.md
index 1e53fac1..21c343cb 100644
--- a/help/FEATURES.md
+++ b/help/FEATURES.md
@@ -333,7 +333,7 @@ xml 代码块 第一行注释需要有 `--drawio--` 文字
 链接属性 `link-type` 值需要是 `luckysheet` 字符串。使用链接的形式也不会影响其他 Markdown 解析器解析。
 
 ```markdown
-[drawio](./test.luckysheet){link-type="luckysheet"}
+[luckysheet](./test.luckysheet){link-type="luckysheet"}
 ```
 
 ## 快捷键
diff --git a/src/renderer/plugins/markdown-luckysheet.ts b/src/renderer/plugins/markdown-luckysheet.ts
index e4c47e81..27b00e68 100644
--- a/src/renderer/plugins/markdown-luckysheet.ts
+++ b/src/renderer/plugins/markdown-luckysheet.ts
@@ -13,6 +13,7 @@ import * as api from '@fe/support/api'
 import { refreshTree } from '@fe/context/tree'
 import { buildSrc, IFrame } from '@fe/context/embed'
 import Mask from '@fe/components/Mask.vue'
+import { FLAG_DEMO } from '@fe/support/global-args'
 
 const logger = getLogger('plugin-markdown-luckysheet')
 
@@ -239,6 +240,20 @@ const LuckyComponent = defineComponent({
 
     watch(props, update, { immediate: true })
 
+    if (FLAG_DEMO) {
+      watch([refFullIFrame, refIFrame], () => {
+        if (refIFrame.value) {
+          refIFrame.value.reload = () => {
+            useToast().show('warning', 'DEMO 模式该功能不可用')
+          }
+        }
+
+        document.querySelectorAll('iframe.lucky-sheet').forEach(x => {
+          (x as any).contentWindow.fetch = window.fetch
+        })
+      })
+    }
+
     const button = (text: string, onClick: any) => h('button', {
       style: 'margin-left: 5px;font-size: 14px;background: #cacaca; border: 0; padding: 0 6px; color: #2c2b2b; cursor: pointer; border-radius: 2px; transition: all .1s ease-in-out; line-height: 24px;',
       onClick
diff --git a/src/renderer/support/demo.ts b/src/renderer/support/demo.ts
index 8dd2b356..27e76d4b 100644
--- a/src/renderer/support/demo.ts
+++ b/src/renderer/support/demo.ts
@@ -143,7 +143,7 @@ if (FLAG_DEMO) {
           }
 
           return xFetch(path).then(res => res.text()).then(md => {
-            cache[path] = md
+            cache[path] = md.replace(/```markdown\n(\[luckysheet\].+)\n```/, '$1')
             data.data.content = message + md
             return data
           })