The present disclosure discloses a washing machine and a washing method, the washing machine comprises a washing tub and a pulsator at a bottom of the washing tub, the pulsator includes a pulsator disk and a plurality of stirring blades arranged on a surface of the pulsator disk. The pulsator disk is a disk-like structure with a bulge at center, each stirring blade extends from the center of the pulsator disk to an edge. A plurality of strip-shaped ribs are vertically arranged on an inner wall of the washing tub, there is a distance between an outside edge of the pulsator and a bottom edge of the inner wall of the washing tub. A tub bottom outer ring is arranged between the outside edge of the pulsator and the bottom edge of the inner wall of the washing tub. A junction of the tub bottom outer ring and the inner wall of the washing tub is circumferentially provided with a plurality of bumps projecting from the tub bottom outer ring and the inner wall of the washing tub. The washing machine is capable of savin
