The invention provides a tool for processing a cubic shell, which includes a through groove, a filter screen, a push plate, a negative pressure fan, a dust collection cover, a left splint, a right splint, a motor one, an electric cylinder one and an electric cylinder two, and the push plate is installed on On the upper end of the workbench, there is a through groove inside the workbench, and a filter is installed inside the through groove. The dust collection cover is assembled on the lower end of the workbench, and the lower end of the dust collection hood is equipped with a negative pressure fan. This design can hold cubes of various heights. The use range is wide, the electric cylinder one is set on the left end of the electric cylinder two, the electric cylinder one is equipped with the motor one, the left end of the motor one is equipped with the right splint, and the left splint is set on the left side of the right splint. The processing debris is collected and cleaned. The invention is convenient to use, easy to operate, good in stability, high in reliability, and reduces labor intensity.