diff --git a/dexcel/src/main.rs b/dexcel/src/main.rs
index 08f2f97..a9ab360 100644
--- a/dexcel/src/main.rs
+++ b/dexcel/src/main.rs
@@ -180,13 +180,34 @@ enum Commands {
 
 // 安全保存辅助
 fn safe_save_umya(book: &mut Spreadsheet, target: &PathBuf) -> Result<()> {
-    if target.exists() {
+    let backup = if target.exists() {
         let backup = target.with_extension("xlsx.bak");
         let _ = fs::remove_file(&backup);
         fs::copy(target, &backup)?;
+        Some(backup)
+    } else {
+        None
+    };
+    
+    // 尝试写入文件
+    match writer::xlsx::write(book, target) {
+        Ok(_) => {
+            // 写入成功，删除备份文件
+            if let Some(bak) = backup {
+                let _ = fs::remove_file(bak);
+            }
+            Ok(())
+        }
+        Err(e) => {
+            // 写入失败，恢复备份
+            if let Some(bak) = &backup {
+                if bak.exists() {
+                    let _ = fs::copy(bak, target);
+                }
+            }
+            Err(DexcelError::Umya(e.to_string()))
+        }
     }
-    writer::xlsx::write(book, target).map_err(|e| DexcelError::Umya(e.to_string()))?;
-    Ok(())
 }
 
 fn get_sheet_mut<'a>(book: &'a mut Spreadsheet, name: &Option<String>) -> Result<&'a mut Worksheet> {
diff --git a/dexcel/测试表.xlsx b/dexcel/测试表.xlsx
deleted file mode 100644
index 589f021..0000000
Binary files a/dexcel/测试表.xlsx and /dev/null differ