The invention discloses an adjustable shot blasting machine. The adjustable shot blasting machine comprises a machine body. Second motors are connected to the machine body and connected with lead screws, screw and nut bases are connected to the lead screws in a threaded mode, and connecting rods are connected to the screw and nut bases and connected with fifth motors through fifth rotating shafts.The other end of each fifth rotating shaft is connected with a shot blasting device, an angle sensor is arranged on each fifth rotating shaft, and fourth motors are arranged in the shot blasting devices and connected with shot storage boxes. Sliding grooves are formed in the shot blasting devices, and an arc-shaped plate is arranged in each sliding groove. A sixth motor is arranged on the other side of each shot blasting device, a sixth rotating shaft is connected to each sixth motor, and each sixth rotating shaft and the corresponding arc-shaped plate are connected through a fixing rod. According to the adjustable shot blasting machine, due to the fact that the shot blasting range of each shot blasting device is adjusted, concentrated shot blasting is conveniently conducted on the localportion of a workpiece, the concentrated processing effect of the surface of the workpiece is improved, the shot blasting machine can be improved to meet the shot blasting requirements of different workpieces, burrs, membranes and iron rust on the workpiece are adequately removed, and the working efficiency and the quality of the shot blasting machine are improved.