When the corn thresher is working, its working principle is mainly that the corn rotates at high speed. The impact of its rotor and drum components can separate the corn kernels from the screening holes, the corn cob is discharged from the tail of the machine, and the corn silk and husk are discharged from the air outlet. The feeding port is located on the upper part of the machine cover, and the corn cob enters the threshing chamber through the feeding port. In the threshing chamber, the corn kernels are hit by the high-speed rotating rotor and fall off. They are separated through the sieve holes. There is a baffle at the lower front of the feeding port to prevent the falling corn kernels from splashing and injuring people. The threshing efficiency of this machine is determined by the length and diameter of the drum, and users can choose this series of corn threshers according to their own threshing efficiency.