The aircraft which is widely used for seed processing and agricultural processing industries is good on the cereal seeds, tree seeds, cotton seed oil seeds, and other selected results and can remove Unfulfilled Valley, Bud Valley, mildew, smut, Grain with the chaff and the geometric dimensions of less than 2 mm Seed, sand, gravel. Hardened dirt lumps can also be removed. after The 1000-grain weight, germination rate, the net, neat, and so on of featured seed were significantly improved. The results will be better once the seeds are selected by this aircraft mainly containing basic-wheat, corn, rice, cotton, sorghum, beans, rapeseed, vegetables, Chinese pine, charged pine, oriental arborvitae, Locust, Spruce and other seeds.