The crawler conveyor shot blasting machine sends the workpiece into the body ejecting area of the cleaning machine room by the adjustable speed conveyor belt. All sides of the body are hit and friction by strong and dense projectiles from different coordinate directions, so that the oxide, rust layer and dirt on it are quickly shed, and the steel surface is obtained a certain roughness of the smooth surface, and the conveyor belt loading and unloading parts are imported and exported on both sides of the cleaning room. The pellets and rust dust falling into the workpiece are blown by the purging device, and the mixture of pellets and dust falling down is transported by the recovery spiral to the chamber funnel, the vertical and horizontal spiral conveyor is collected in the lower part of the elevator, and then lifted to the separator on the upper part of the machine. The separated pure pellets fall into the separator hopper for shot blasting cycle. The dust generated during shot blasting is sent to the dust removal system by the exhaust pipe, and the net gas after purification is discharged into the atmosphere, and the granular dust is captured and collected. Conveying shot blasting machine is generally roller table type, crawler type conveying and catenary through type.