diff --git a/lib/notion/getPostBlocks.js b/lib/notion/getPostBlocks.js
index ca3090dd..be228594 100644
--- a/lib/notion/getPostBlocks.js
+++ b/lib/notion/getPostBlocks.js
@@ -63,6 +63,7 @@ export async function getPageWithRetry(id, from, retryAttempts = 3) {
 
 /**
  * 获取到的blockMap删除不需要的字段
+ * 并且对于页面内容进行特殊处理，比如文件url格式化
  * @param {*} id 页面ID
  * @param {*} pageBlock 页面元素
  * @param {*} slice 截取数量
@@ -72,6 +73,7 @@ function filterPostBlocks(id, pageBlock, slice) {
   const clonePageBlock = deepClone(pageBlock)
   let count = 0
 
+  // 循环遍历文档的每个block
   for (const i in clonePageBlock?.block) {
     const b = clonePageBlock?.block[i]
     if (slice && slice > 0 && count > slice) {
@@ -99,6 +101,13 @@ function filterPostBlocks(id, pageBlock, slice) {
       }
     }
 
+    // 如果是文件，需要重新加密签名
+    if (b?.value?.type === 'file' && b?.value?.properties?.source?.[0][0]) {
+      const oldUrl = b?.value?.properties?.source?.[0][0]
+      const newUrl = `https://notion.so/signed/${encodeURIComponent(oldUrl)}?table=block&id=${b?.value?.id}`
+      b.value.properties.source[0][0] = newUrl
+    }
+
     delete b?.role
     delete b?.value?.version
     delete b?.value?.created_by_table