The invention discloses an impeller having the function of capability of lifting and washing clothes, comprising a wave disc and a plurality of ridgeplates which are arranged on the upper surface of the wave disc, wherein, each ridgeplate comprises a ridgeplate matrix which is arranged on the upper surface of the wave disc; the inside of the ridgeplate matrix is hollow, and an opening is arrangedon the upper surface of the ridgeplate matrix; a groove is formed by the opening and the hollow inside; one end in the groove close to the center of the wave disc is connected with a ridge beam through a rotary shaft or a hinge; one end of the ridge beam far away from the center of the wave disc can be lifted up from the opening, and lifting means can be that the ridge beam is supported by a spring which is arranged inside the groove of the ridgeplate matrix and up-vertically connected with the groove and also can be that the ridge beam is floated off under water by a structure and materials of the ridge beam. The structure is automatically arranged on a lifting position when water level is high, and barrier mechanisms are correspondingly arranged on side faces of ridge beams and side faces of grooves in order to increase resistance torsion of water on resisting rotation of the impeller. Moreover, a part of the ridge beams is guaranteed to be always arranged inside the groove. And thestructure is pressed down by the clothes and on a descending position when the water level is low and completely enters into the inside of ridgeplate matrixes, thereby combination of washing and agitator treating is realized.