The Wuxi CNC machine tool adopts a structure in which the worktable is fixed, the gantry frame moves on the bed (X-axis), the spindle box moves on the sliding saddle (Z-axis), and the sliding saddle and spindle box move on the crossbeam (Y-axis). The spindle box adopts a square sliding pillow structure, and through two-stage gearbox transmission, the crossbeam can be raised and lowered up and down to achieve machining of ultra-high parts, and can achieve high torque and high power machining; The workbench is fixed and suitable for processing large and overweight parts. It has the characteristics of high speed, high precision, high flexibility, small footprint, and strong load-bearing capacity