The invention discloses a novel large torque roof bolter. The novel large torque roof bolter includes a tip, a
handle, a landing leg, a fixing sleeve, a conversion
handle, a reduction box shell, a
drill sleeve, a water blocking sleeve, a motor shell, a support ring, a regulating shaft, a fixing sleeve, an operating arm, a support plate, a
handle frame, a back cover plate, a
cylinder head inner hexagon screw, an air inlet, an auxiliary shaft, a drive gear shaft, a main shaft, a bearing, and an air outlet. The tip is arranged at the bottom end of a base, equipment is convenient to fix. The landing leg is arranged at the top end of the base, the fixing sleeve is arranged at the top end of the handing leg, the fixing sleeve fastens the landing leg and the back cover plate, so that the equipment is steadier. The fixing sleeve is rotationally connected with the fixing sleeve through the regulating shaft, the operating arm is arranged in the fixing sleeve, and the equipment is convenient to operate. The air inlet is arranged at the top end of the back cover plate, and the air outlet is arranged at the position, depart from one end of the air inlet, of the top end of the base plate. The air outlet drives the auxiliary shaft and the drive gear shaft to rotate, the gear is arranged at the top end of the drive gear shaft, the angle of the conversion handle is rotated, and the position ofthe gear can be changed, so that the effect of changing torque is achieved.