Suction style specific weight stone remover is mainly used in foodstuff or feedstuff plants. The stone remover is able to remove stone from grains, wheat, rice, beans, corns, sesames, rapeseeds and malts as well as other granules such as chemical plastics. It is ideal equipment in modern foodstuff processing. Utilizing the property that the grains and the mixed stone have different specific weight and suspension speed as well as the airflow that is blown upward through the grains, the machine keep the heavy impurity at the lower layer and uses a screen to force the material and impurity to move in different directions, thus separating the two of them. This machine employs vibration motor driving gears, which ensures stable operation, sturdy and reliable work, steady performance and low vibration and noise. There's no powder and it is easy to operate and to provide maintenance to it. The wind magnitude and wind pressure can be easily adjusted in a wide range with a displaying device available. A well-illuminated air suction hood is equipped, which ensures clear observation of the movement of materials. Besides, on both sides of the screen there are four holes available that make cleaning easy. The inclination angle of the screen can be adjusted within a scope of 7-9. Therefore, this machine stone is able to maintain stone-removing effect even the amount of material fluctuates. It can be used to remove the mixed stones in foodstuffs, grease, feedstuffs and chemical products.