Automatic precise cutting cantilever heading machine and cutting method

The invention provides an automatic precise cutting cantilever tunneling machine and a cutting method, and relates to the technical field of tunneling. The heading machine comprises a cutting head, a telescopic cutting arm, a heading machine shovel plate and a center positioning system, the telescopic cutting arm is loaded at the front end of the heading machine, the cutting head is arranged at the end of the telescopic cutting arm, the heading machine shovel plate is arranged in front of the heading machine, and the center positioning system controls the heading machine to conduct automatic heading construction. The cutting method using the heading machine for cutting comprises the steps of heading head-on arc cylindrical surface cutting and double-same-direction cutting along the periphery, and the arc cylindrical surface formed by middle cutting has good self-balancing capacity and has the effect of protecting the top and the side; cutting along the periphery does not damage the side top of the roadway, th