diff --git a/backend/database.js b/backend/database.js
index 10c88b0..590f354 100644
--- a/backend/database.js
+++ b/backend/database.js
@@ -303,9 +303,15 @@ const ShareDB = {
     if (expiry_days) {
       const expireDate = new Date();
       expireDate.setDate(expireDate.getDate() + parseInt(expiry_days));
-      // 转换为SQLite datetime格式 (YYYY-MM-DD HH:MM:SS),而不是ISO格式
-      // 这样才能正确与 datetime('now') 进行比较
-      expiresAt = expireDate.toISOString().replace('T', ' ').replace(/\.\d+Z$/, '');
+      // 使用本地时区时间,而不是UTC时间
+      // 这样前端解析时会正确显示为本地时间
+      const year = expireDate.getFullYear();
+      const month = String(expireDate.getMonth() + 1).padStart(2, '0');
+      const day = String(expireDate.getDate()).padStart(2, '0');
+      const hours = String(expireDate.getHours()).padStart(2, '0');
+      const minutes = String(expireDate.getMinutes()).padStart(2, '0');
+      const seconds = String(expireDate.getSeconds()).padStart(2, '0');
+      expiresAt = `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
     }
 
     const stmt = db.prepare(`
@@ -336,7 +342,7 @@ const ShareDB = {
   // 根据分享码查找
   findByCode(shareCode) {
     // 调试日志: findByCode 调用
-    const currentTime = db.prepare("SELECT datetime('now') as now").get();
+    const currentTime = db.prepare("SELECT datetime('now', 'localtime') as now").get();
     console.log('[ShareDB.findByCode]', {
       shareCode,
       currentTime: currentTime.now,
@@ -348,7 +354,7 @@ const ShareDB = {
       FROM shares s
       JOIN users u ON s.user_id = u.id
       WHERE s.share_code = ?
-        AND (s.expires_at IS NULL OR s.expires_at > datetime('now'))
+        AND (s.expires_at IS NULL OR s.expires_at > datetime('now', 'localtime'))
     `).get(shareCode);
 
     // 调试日志: SQL查询结果