Heading machine capable of adopting central screw machine to discharge slag

The invention relates to the field of soil layer or rock stratum tunneling equipment, in particular to a tunneling machine capable of adopting a central screw machine for deslagging. The heading machine comprises a main machine, the main machine comprises a shield body, a cutterhead and a main drive, the main drive comprises a drive box, a spiral conveyor is installed in an inner hole of the drive box through a seat flange, a knuckle bearing is arranged on the spiral conveyor, opposite guide rails are arranged in the inner hole of the drive box, and the guide rails are arranged on the guide rails. Anti-twisting blocks corresponding to the guide rails are arranged on the knuckle bearings, a limiting groove corresponding to the anti-twisting blocks is defined between the two guide rails, and the limiting groove is matched with the anti-twisting blocks to limit rotation of the spiral conveyor. According to the spiral conveyer, an existing heading machine is improved, the limiting groove limited by the two guide