Catenary pass-through shot blasting machine is suitable for shot blasting of large and medium-sized workpieces. Workpieces can be run continuously with chain, step-by-step operation, using advanced accumulation and push catenary to transport workpieces, so that the workpieces are stopped in the loading and unloading and shot blasting areas, respectively Process work, including single hook lifting weight of 50 ~ 2000kg, and its high productivity and reliable operation, for some workpieces with complex surfaces and internal cavities, if the cleaning effect of the engine cylinder head, motor housing, etc. is very good. This product uses industries such as automobiles, tractors, diesel engines, motors, and valves.