The invention discloses a corn husker. The corn husker comprises a box body, a peeling roller and a metal roller, wherein the peeling roller and the metal roller are arranged inside the box body; the peeling roller and the metal roller are bonded and parallel with each other; the peeling roller comprises a roller column and a wearing layer; the wearing layer is sleeved on the periphery of the roller column and formed by superposing circular wearing rings; and the size of the inner hole of each wearing ring is matched with that of the diameter of the external circle of the roller column. The corn husker has the advantages of effectively reducing the wearing degree of a roller, exchanging the roller conveniently and preventing the normal production schedule from being influenced due to roller exchange. Moreover, in the corn husker, the wearing rings made of tire materials with fibers are superposed on the roller column one by one and finally all the wearing rings are integrally compressed to form the wearing layer of the roller. The corn husker can process about 2,000kg of corns per hour and can be continuously used for many days without exchanging the wearing rollers.