Corn threshing and cob breaking machine

The invention discloses a corn threshing and cob breaking machine which comprises a threshing chamber and a cob breaking chamber. The threshing chamber and the cob breaking chamber are located in different positions of a same overall chamber. A corn threshing mechanism is arranged in the threshing chamber and comprises four rollers different in diameter. The rollers include a large spiral tooth roller, a straight tooth roller, a small spiral tooth roller and a slag discharging spiral tooth roller, and the big-end-up V-shaped space is formed among the rollers, an L-shaped pressure baffle plate is arranged under a corn threshing and feeding port, a binding is arranged on one side, of a gap between the straight tooth roller and the small spiral tooth roller, inside the machine, a corn cob discharging outlet is arranged in an end plate, and a corn kernel discharging outlet is arranged under the threshing chamber; a corn cob breaking mechanism is arranged in the cob breaking chamber and comprises fixed cutters and