HT300 cast iron is adopted for the main foundation parts such as base, sliding seat, workbench, column and headstock; The substructure is a box structure, and the compact and reasonable symmetrical reinforcement structure ensures the high rigidity, bending resistance and damping performance of the foundation parts; A-span column and internal grid reinforcement effectively ensure the rigidity and accuracy of z-axis strong cutting; The basic parts are molded with resin sand and aging treatment, which provides a guarantee for the stability of the long-term service performance of the machine tool.