diff --git a/xian_favor/api.py b/xian_favor/api.py
index 151d93b..8499559 100644
--- a/xian_favor/api.py
+++ b/xian_favor/api.py
@@ -2185,7 +2185,69 @@ async function openEditModal(id) {
     // 设置重点关注状态
     document.getElementById('editStarred').checked = item.is_starred === 1;
     
-    new bootstrap.Modal(document.getElementById('editModal')).show();
+    // 保存原始数据用于比较
+    window.editOriginalData = {
+        type,
+        title: item.title || '',
+        content: item.content || '',
+        url: item.url || '',
+        source: item.source || '',
+        status: item.status,
+        priority: item.priority,
+        due_date: item.due_date,
+        note: item.note || '',
+        tags: item.tags.join(', '),
+        is_starred: item.is_starred
+    };
+    
+    const modal = new bootstrap.Modal(document.getElementById('editModal'));
+    modal.show();
+    
+    // 监听关闭事件，检查是否有修改
+    document.getElementById('editModal').addEventListener('hide.bs.modal', function(e) {
+        if (hasEditChanges()) {
+            if (!confirm('您已修改内容但未保存，是否放弃修改？')) {
+                e.preventDefault();  // 取消关闭
+            }
+        }
+    }, { once: true });
+}
+
+// 检查编辑内容是否有修改
+function hasEditChanges() {
+    if (!window.editOriginalData) return false;
+    
+    const type = document.getElementById('editType').value;
+    const current = {
+        type,
+        title: document.getElementById('editTitle').value,
+        content: document.getElementById('editContent').value,
+        url: document.getElementById('editUrl').value,
+        source: document.getElementById('editSource').value,
+        note: document.getElementById('editNote').value,
+        tags: document.getElementById('editTags').value,
+        is_starred: document.getElementById('editStarred').checked ? 1 : 0
+    };
+    
+    if (type === 'todo') {
+        current.status = document.getElementById('editStatus').value;
+        current.priority = document.getElementById('editPriority').value;
+        current.due_date = document.getElementById('editDueDate').value;
+    }
+    
+    // 比较各字段
+    return current.title !== window.editOriginalData.title ||
+           current.content !== (window.editOriginalData.content || '') ||
+           current.url !== (window.editOriginalData.url || '') ||
+           current.source !== (window.editOriginalData.source || '') ||
+           current.note !== (window.editOriginalData.note || '') ||
+           current.tags !== window.editOriginalData.tags ||
+           current.is_starred !== window.editOriginalData.is_starred ||
+           (type === 'todo' && (
+               current.status !== window.editOriginalData.status ||
+               current.priority !== window.editOriginalData.priority ||
+               current.due_date !== (window.editOriginalData.due_date || '')
+           ));
 }
 
 // 根据类型更新编辑表单字段显示
@@ -2225,6 +2287,7 @@ async function saveEdit() {
         const result = await res.json();
         
         if (res.ok && result.success) {
+            window.editOriginalData = null;  // 清除原始数据，避免关闭时询问
             bootstrap.Modal.getInstance(document.getElementById('editModal')).hide();
             refreshData();
         } else {