diff --git a/src/cleaner.rs b/src/cleaner.rs
index 469a7f2..7c1d34c 100644
--- a/src/cleaner.rs
+++ b/src/cleaner.rs
@@ -1,6 +1,6 @@
 // src/cleaner.rs
 
-use chrono::{Duration as ChronoDuration, TimeZone, Utc};
+use chrono::{Duration as ChronoDuration, NaiveDate, TimeZone, Utc};
 use sqlx::{PgPool, Row};
 use std::path::{Path, PathBuf};
 use std::time::Duration;
@@ -162,29 +162,66 @@ async fn cleanup_files(
         return Ok(());
     }
 
+    let threshold_date = threshold.date_naive();
+
     let mut entries = tokio::fs::read_dir(log_dir).await?;
     while let Some(entry) = entries.next_entry().await? {
         let path = entry.path();
-        if path.is_file() {
-            if let Some(file_name) = path.file_name().and_then(|n| n.to_str()) {
-                // 【重要】增加了前缀匹配，更加安全
-                if !file_name.starts_with(prefix) || !file_name.ends_with(".log") {
-                    continue;
+        if path.is_file()
+            && let Some(file_name) = path.file_name().and_then(|n| n.to_str())
+        {
+            // 【重要】增加了前缀匹配，更加安全
+            if !file_name.starts_with(prefix) || !file_name.ends_with(".log") {
+                continue;
+            }
+            let mut should_delete = false;
+
+            let rest = &file_name[prefix.len()..];
+            // 处理可能存在的连接符，比如 prefix="order-service"，文件名是 "order-service-2023..."
+            let date_part = if rest.starts_with('-') || rest.starts_with('_') {
+                &rest[1..]
+            } else {
+                rest
+            };
+            if date_part.len() >= 10 {
+                let date_str = &date_part[0..10];
+                if let Ok(file_date) = NaiveDate::parse_from_str(date_str, "%Y-%m-%d") {
+                    // 成功从文件名解析出日期！
+                    println!(
+                        "  -> Parsed date from filename: {} ({})",
+                        file_name, file_date
+                    );
+
+                    if file_date < threshold_date {
+                        should_delete = true;
+                    }
+                } else {
+                    // 解析失败，说明文件名格式不对，回退到使用 Mtime
+                    should_delete = check_by_mtime(&entry, threshold).await;
                 }
+            } else {
+                // 长度不够，回退到 Mtime
+                should_delete = check_by_mtime(&entry, threshold).await;
             }
 
-            let metadata = entry.metadata().await?;
-            if let Ok(modified_sys) = metadata.modified() {
-                let modified: chrono::DateTime<Utc> = modified_sys.into();
-                if modified < threshold {
-                    if let Err(e) = tokio::fs::remove_file(&path).await {
-                        eprintln!("Failed cleanup file {:?}: {}", path, e);
-                    } else {
-                        println!("Removed expired log file: {:?}", path);
-                    }
+            if should_delete {
+                if let Err(e) = tokio::fs::remove_file(&path).await {
+                    eprintln!("Failed cleanup file {:?}: {}", path, e);
+                } else {
+                    println!("Removed expired log file: {:?}", path);
                 }
             }
         }
     }
     Ok(())
 }
+
+async fn check_by_mtime(entry: &tokio::fs::DirEntry, threshold: chrono::DateTime<Utc>) -> bool {
+    if let Ok(metadata) = entry.metadata().await
+        && let Ok(modified_sys) = metadata.modified()
+    {
+        let modified: chrono::DateTime<Utc> = modified_sys.into();
+        return modified < threshold;
+    }
+    false
+}