The invention relates to a database backup and recovery method. The method comprises the steps that a plurality of distribution servers are used for storing a database and providing database servicestogether; all sub-databases of the database are backed up on the t distribution servers at the same time, wherein t is a pre-set backup redundancy degree of the database; if one distribution server loses data and stores E sub-bases, the other E distribution servers which store the E-sub-bases are found separately and subjected to data recovery.