The invention provides an impeller and a device using the impeller, and belongs to the technical field of finishing equipment. The impeller comprises a hub and a plurality of blades which are connected with the hub in an annular array; the blades are all arranged in a y shape; each blade surrounds the hub; an elastic cavity is formed between a furcal end of each blade and the hub. The device using the impeller comprises a guide mechanism, a gathering mechanism which is connected with a material outlet of the guide mechanism and internally provided with the impeller, and a conveying mechanism connected with a material outlet of the gathering mechanism. According to the impeller and the device using the impeller, the blades are uniformly arranged on the hub, so that the stress uniformly of the hub and the paper treatment continuity are ensured; meanwhile, the elastic cavity is formed at the connecting position of each blade and the hub, so that the bearing limit range of the blades is enlarged, the blades are prevented from being torn, the service life of the impeller is prolonged, and the using cost is reduced.