Shot-blasting machine is a kind of shot-blasting equipment, which is applied to clean the surface of steel structure welding workpiece, H-style steel, plate and other profiles. It can clean away rusty spot, rusty scale,welding slag on the workpiece surface, as well as welding stress, in order to remove stress and improve surface lacquer quality and rot proofness of steel structure and steel.Dedusting system adopts filtration type of back flushing. Dust collector adopts folded dedust filter cylinder, and the dedusting area has increased. The filter cylinder adopts nano-meter fiber technology; dust collection efficiency is more than 99.99%, especially for dust particles with a diameter of 0.5μm. After efficient filtration, the air is clean and can be recycle used or indoor emission. The pulse controller can adjust the frequency, speed and intensity of ash removal, compared with domestic traditional bag type single grade dedusting system, it has advantages of high dedust efficiency, lower operation resistance, small volume, light weight, easy replacement and so on. Emission quantity meets the national emission standard.