diff --git a/backup.sh b/backup.sh
index 32342c7..a694e38 100755
--- a/backup.sh
+++ b/backup.sh
@@ -31,7 +31,7 @@ cd ${backUpPath}
 # 遍历60个小时前的备份文件，并将文件名存入数组
 while IFS= read -r -d '' file; do
     old_backup_files+=("$file")
-done < <(find ${backUpPath} -name "${dbName}_backUp_*.tar.gz" -type f -mmin +3600 -print0)
+done < <(find ${backUpPath} -name "${dbName}_backUp_*.tar.gz" -type f -mmin +1440 -print0)
 
 # 遍历数组，删除备份文件
 for file in "${old_backup_files[@]}"; do