The machine is composed of a material inlet and outlet of screen box, vibration source and shock absorber of three parts. Frame and screen box is connected with a 4 to 6 groups of soft rubber shock absorber under fixed, the boot that is produce centrifugal force amplitude is eccentric block, shock absorber and the corresponding control, so as to achieve the required for optimal performance, so that the material has a parabolic shock and loosening of the screening process. Widely used in pharmaceutical, food, chemical industry, metallurgy, electronics and other industries to filter the ideal equipment.