Hard rock ditching machine and hard rock ditching method

The invention provides a hard rock furrowing machine and a hard rock furrowing method.The hard rock furrowing method comprises the step that the hard rock furrowing machine goes uphill in a pipe ditch, the hard rock furrowing machine comprises a front walking unit and a rear walking unit, a cutting device and a cutting cantilever are arranged on the front walking unit, and an energy unit is arranged on the rear walking unit; supporting devices are arranged on the front walking unit and the rear walking unit respectively, the supporting devices are located on the left side and the right side of the corresponding walking unit, each supporting device comprises a device base fixed to the corresponding walking unit, a telescopic arm is assembled on each device base, and a supporting bottom foot used for being supported to the corresponding side wall of a pipe ditch is arranged at the tail end of each telescopic arm; the hard rock ditcher further comprises a telescopic driving device, the two ends of the telescopic