The invention discloses a pulsator washing machine and a control method. The pulsator washing machine comprises an inner drum and an outer drum, the inner drum comprises an inner drum bottom, an impeller is arranged in the inner drum bottom, a diversion channel is formed in the portion, on the periphery of the impeller, of the inner drum bottom, and when the impeller rotates, water flow is pushed to enter the portion between the inner drum and the outer drum along the diversion channel, climbs upwards along the outer drum and is ejected into the inner drum. Accordingly, by making the transversely penetrating diversion channel formed in the inner drum bottom of the washing machine, water is pushed through the impeller, the water flow is pushed to the portion between the inner drum and the outer drum, the water flow can climb upwards to an inner drum opening along the inner wall of the outer drum and is ejected into the inner drum, the ejection force is high, the number of water channels formed in the inner drum wall can be reduced, the volume of capacity of the inner drum is increased, water can be sprayed into the inner drum from the inner drum opening, the water can be sprayed to clothes such as down jackets which are high in suspension force, and the washing effect on various clothes is enhanced.