Metadata backup method and device, computer readable medium and electronic equipment

The embodiment of the invention provides a backup method and device for metadata in an object storage system, a computer readable medium and electronic equipment, the object storage system comprises an object data storage system and a metadata storage system, and the method comprises the steps that metadata of a target object in the metadata storage system is exported as a cold backup file, object data of the target object is stored in the object data storage system; the cold backup file is stored in a special storage bucket, an object storage system stores object data of the cold backup file in an object data storage system and stores metadata of the cold backup file in a metadata storage system, and the special storage bucket is different from a storage bucket of a target object; and exporting metadata of the cold backup file in the metadata storage system as a first backup file, and storing the first backup file to a target file system independent of the object storage system. The embodiment of the inventi