The invention discloses a pedal type washing machine. Clothes to be dried are placed in a working cavity composed of rotary vanes, a pedal is treaded to reciprocate and drive a connecting rotary shaft and a bevel gear to move, the bevel gear is meshed with a helical tooth holder, the helical tooth holder rotates, and the rotary vanes on top of the helical tooth holder rotate along with the helical tooth holder; an arc-shaped transition groove is formed in a disc body, and the rotary vanes rotate along the arc-shaped transition groove; at the moment, the rotary vanes gather together, the space of the working cavity becomes smaller gradually, the clothes to be dried are squeezed by the rotary vanes so that water can be squeezed out, and water which is squeezed out enters a water collection cavity in a base along water permeation holes in the rotary vanes and the surface of the helical tooth holder, and then discharged through a drain hole.