A method of backing up and recovering data in the hard disk of a computer, comprising a step of backing up data in the hard disk, including: allocating a mirror partition in a hard disk for backing up the data in a partition of the hard disk where the data need to be backed up are stored; backing up integrally the data in the backed up partition specified by the user into the allocated corresponding mirror partition; and hiding the space of the mirror partition; the method further comprising a recovery step for recovering integrally the hard disk data in the mirror partition into the corresponding backed up partition according to the instruction of the user. The present invention can back up and recovery all kinds of data in the hard disk safely and reliably.