1. The machine body adopted optical computerized structure design with the feature s of wide body and column, precise caseing, good stability, stong shock absorption and rigid structure. 2.3-axis rectangle guide rail adopted te design of triangle supporting with super HF quenching treatment and fine peripheral grinding. 3. Big precise guiding ball screw equipped with precise angle balll bearing with tightening installation, boasting accurate feeding and trong loading. 4. Turcite-B wearing bit and other friction, parts which touch with rectangle guide rail has good stability. 5. It has the design of wide machie body, long table, whole travelling support of worktable and stong loading.