The utility model discloses a pneumatic bolting machine, including a body, a blade and an impact block. The inside of the body is provided with a rotor, a blade, a cylinder, a front cover and a rear cover; the rotor is milled with a long groove and the blade is arranged inside the groove; the external surface of the rotor, the internal surface of the cylinder, the blade and the cover with both ends sealed are used to divide the cylinder into a sealed workshop; the front cover and the rear cover are used to seal the cylinder and fix the rotor; a handle is connected with the body and the inside of the handle is provided with a trigger, a reversing valve and an intake valve; the front body is provided with a retainer, an impact block, an impact pin and a throw shaft. The utility model with simple structure and convenient operation achieves the bolting machine of large torque under the condition of small reaction torque through impulsive rotation and ensuring the installation quality.