diff --git a/library/think/log/driver/File.php b/library/think/log/driver/File.php
index 3f6522d1a39ba18168213dbf49eac70b650f58da..998256314c00e6ea107285fabbf900868a2bea67 100644
--- a/library/think/log/driver/File.php
+++ b/library/think/log/driver/File.php
@@ -140,6 +140,9 @@ class File
 
             try {
                 if (count($files) > $this->config['max_files']) {
+                    usort($files, function($a,$b){
+                        return filemtime($a) - filemtime($b);
+                    });
                     unlink($files[0]);
                 }
             } catch (\Exception $e) {