Rotary cutting test bed for hard rock tunneling hob

The invention discloses a rotary cutting test bed for a hard rock tunneling hob. The rotary cutting test bed for the hard rock tunneling hob aims to solve the problems that an existing hard rock tunneling hob test bed generally replaces rotary cutting with linear cutting, the working environment and conditions of a hob and rock cannot be simulated, the service life is short, and the reliability islow. The rotary cutting test bed for the hard rock tunneling hob comprises two motor driving units, a main shaft unit, a cutter unit, a longitudinal loading moving unit and a confining pressure temperature loading unit, wherein the main shaft unit comprises an outer sleeve and a transition disc; the longitudinal loading moving unit comprises an upper flat plate and a lower flat plate; the longitudinal loading moving unit is mounted on a foundation through the lower flat plate, and the upper flat plate is mounted over the lower flat plate in parallel; the main shaft unit is mounted in the center of the upper flat plat