diff --git a/blog.config.js b/blog.config.js
index 65683d0d..ae020dac 100644
--- a/blog.config.js
+++ b/blog.config.js
@@ -114,7 +114,9 @@ const BLOG = {
 
   CODE_MAC_BAR: process.env.NEXT_PUBLIC_CODE_MAC_BAR || true, // 代码左上角显示mac的红黄绿图标
   CODE_LINE_NUMBERS: process.env.NEXT_PUBLIC_CODE_LINE_NUMBERS || false, // 是否显示行号
-  CODE_COLLAPSE: process.env.NEXT_PUBLIC_CODE_COLLAPSE || true, // 是否折叠代码框
+  CODE_COLLAPSE: process.env.NEXT_PUBLIC_CODE_COLLAPSE || true, // 是否支持折叠代码框
+  CODE_COLLAPSE_EXPAND_DEFAULT: process.env.NEXT_PUBLIC_CODE_COLLAPSE_EXPAND_DEFAULT || true, // 折叠代码默认是展开状态
+
   // END********代码相关********
 
   // Mermaid 图表CDN
diff --git a/components/PrismMac.js b/components/PrismMac.js
index 0a69e55e..3e568e9f 100644
--- a/components/PrismMac.js
+++ b/components/PrismMac.js
@@ -105,13 +105,20 @@ const renderCollapseCode = () => {
     codeBlock.parentNode.insertBefore(collapseWrapper, codeBlock)
     panel.appendChild(codeBlock)
 
-    header.addEventListener('click', () => {
+    function collapseCode() {
       panel.classList.toggle('invisible')
       panel.classList.toggle('h-0')
       panel.classList.toggle('h-auto')
       header.querySelector('svg').classList.toggle('rotate-180')
       panelWrapper.classList.toggle('border-gray-300')
-    })
+    }
+
+    // 点击后折叠展开代码
+    header.addEventListener('click', collapseCode)
+    // 是否自动展开
+    if (JSON.parse(BLOG.CODE_COLLAPSE_EXPAND_DEFAULT)) {
+      header.click()
+    }
   }
 }