The invention relates to the field of concentration and filtration of high-purity active aluminum powder slurry. A high-purity active aluminum powder concentration device comprises an aluminum powder concentrator (1) and an aluminum powder slurry tank (2), a filter device (6) is arranged in the aluminum powder concentrator (1), and an alpha nozzle (4) is arranged on the side wall, at the position of the lower portion of the filter device (6), of the aluminum powder concentrator (1). The alpha nozzle (4) is sequentially connected with a diaphragm pump (3) outside the aluminum powder concentrator (1) and the aluminum powder slurry tank (2) through a pipeline. The high-purity active aluminum powder concentration device further comprises an air supply station (5), and the air supply station (5) is connected with an air nozzle above the filter device (6) in the aluminum powder concentrator (1) through a pipeline. By cyclone feeding, primary separation of the active aluminum powder and water is realized, and filter load is relieved when supernatant passes through the upper filter device; concentrated aluminum powder slurry is easily delivered into a reactor, so that labor intensity is relieved for staffs.