The gravity stone remover is composed of afeeding device and an air suction adjustmentdevice equipped with the air-blower, suctionhood,screen body,vibration mechanismframe and other parts composition. The airis sucked on the stone removal screen plateand no dust is blown out.The machine runs smoothly, has little vibra.tion and noise, the air volume can be adjust-ed convenient. Suitable for barley, corn, soybean, rice, coarse grain.Grading, impurity removal, and stone remov-al of rice, rye and other grains, especially.It is to solve the problem of excessive sandcontent in flour mills and the need to produce rice without washingUpdate devices as preferred.