Hard rock tunnel boring machine

A hard rock tunnel boring machine (TBM), comprising: a cutter (10) for cutting rock; a drive system (20) for driving the cutter (10) to rotate; a main beam (30) comprising a front main beam (31) and a rear main beam (32) hinged to the front main beam; the cutter (10) is disposed on the drive system (20) and the drive system (20) is disposed on the front main beam (31); an advancing/support/step-changing system for moving the main beam (30) forward, and comprising an advancing device (40) connected to the front main beam (31) and the rear main beam (32), the advancing device (40) being able to adjust the included angle between the front main beam (31) and the rear main beam (32) during turning and tunnel boring. The hard rock tunnel boring machine can realize turning and tunnel boring with a small turning radius when performing the tunnel boring operation.