The workpiece is horizontally placed on the loading logistics rack (provided by the user). The plate chain conveyor mechanism drives the steel cylinders to roll onto the plate chain conveyor mechanism in turn through the fork. At the same time, the steel cylinders returned from the previous process are unloaded. The plate chain conveyor mechanism has the functions of loading and unloading as well as positioning the steel cylinders; After the electrical system confirms that the four steel cylinders have been loaded in place through the sensor, the hydraulic cylinder under the translation trolley drives the electric permanent magnet lifting appliance to descend. After the electric permanent magnet lifting appliance is lowered in place, the four steel cylinders are lifted at the same time, and then the translation trolley drives the steel cylinders to move to the top of the turnover frame and places the four steel cylinders on the bottle carrier trolley. The translation trolley moves back to make room for the turnover of the turnover frame; The propelling cylinder pushes the bottle carrier car and the cylinder to the position of the self rotating seat, and the turnover cylinder works to turn the workpiece to a certain angle for positioning, which is consistent with the chamber housing; The spray gun, driven by the moving device of the spray gun, moves along the track and enters the interior of the cylinder. At the same time, the spray gun is shot blasted, the cylinder rotation mechanism starts to work, and the cylinder rotates; After the gun moves in the cylinder for shot peening, stop shot peening. The gun sprays high-pressure gas to blow off the shot and attached dust in the cylinder. The gun moves out of the cylinder, and the gun stops; Turn over the cylinder to work, turn the cylinder to the horizontal state, push the cylinder back, and the cylinder back from the rotation base; The translational trolley moves forward to the top of the turnover frame, the electric permanent magnet spreader descends to lift the steel cylinder, the translational trolley rotates to the top of the plate chain conveyor mechanism, the electric permanent magnet spreader descends to lower the steel cylinder to the plate chain conveyor mechanism, and the spreader rises; The plate chain mechanism operates, the unloading completes the loading at the same time, and the next work cycle is carried out; The dust generated in the whole shot blasting process is absorbed and fallen back by the dust removal system, meeting the environmental requirements.