The invention discloses a pulsator washing machine which comprises a machine body, an outer tub, an inner tub, an impeller and a siphon. The outer tub is arranged inside the machine body, the inner tub is arranged inside the outer tub, the outer wall face of the inner tub is closed, the impeller is rotationally arranged at the bottom of the inner tub, the siphon comprises an inner tube and an outer tube, the inner tube is arranged on the inner wall face of the inner tub, the lower end of the inner tube stretches into the bottom of the inner tub, the upper end of the inner tube extends upwards to be communicated with the upper end of the outer tube, the outer tube is arranged on the outer wall face of the inner tub, a drainage opening is formed in the lower end of the outer tube, and the siphon is constructed to draining water inside the inner tub from the drainage opening when the inner tub rotates. According to the pulsator washing machine, the inner tub and the outer tub are separated, and the siphon is arranged on the inner wall face and the outer wall face of the inner tub, so that water consumption is reduced in the washing process, dirt accumulation on the outer tub is avoided, the effects of saving water and removing dirt are achieved, automatic drainage is performed by means of the siphon action, and the effect of energy conservation can be achieved.