Top quality white kidney beans, White kidney beans processing First step: machine selected, decrease admixture Second step: stoning machine, wipe out the stone and stick Third step: magnetic separator, wipe out soil block. Fourth step: specific gravity stoner, wipe out bad beans. Fifth step: after two times processing by specific gravity stoner, beans polished by polished machine Sixth step: beans are transmitted to the colour selected machine by a conveyor Seventh step: classifying Screen, distinguish the size of the bean Eight steps: hand selected. Ninth step: automatic packing Tenth step: storage