Corn thresher can't remove sunflower seeds. The function of corn thresher is to thresh the dried ears of corn. Most of them are axial-flow drum type and vertical threshing disc type. Corn thresher is mainly composed of roller, concave plate, sieve, fan, feed hopper, grain chute, screw guide rod and so on. The seeds of oil sunflower are too small and the plates are too big to look like corncobs. The corn thresher can't get rid of the oil sunflower seeds.