The invention discloses a method and device for air pulsating filtering screening and concentrating. An air pulsating generating device is additionally arranged on a common positive and negative pressure filtration device; during the working, great positive and negative explosive force generated instantaneously by the air pulsating can help finish the powerful filtering and cake unloading. In thecase of continuous material offering, the novel device has the advantages of high handling capacity, thin or ultrathin cake unloading, long service life, simple structure and the like and can achievethe effect which cannot be achieved by other filtering device.