The small CNC vertical lathe has good stability and anti-vibration performance, vertical structure, easy to clamp the workpiece, small footprint, oil-water separation structure, so that the cooling water is clean and environmentally friendly, and the separated cooling water tank is easy to clean, precise and high rigidity The cartridge type spindle structure is easy to maintain. The spindle sleeve is fully symmetrical and suspended design, which better eliminates the influence of thermal deformation on the machining accuracy of the CNC vertical lathe. The high-power AC spindle motor enhances the stability of the machine tool operation. The spindle adopts Imported high-grade grease lubrication, fully enclosed, maintenance-free bed saddle, column guide rail adopts over-heavy load linear rolling guide, with good dynamic response performance, high precision retention, and high-quality equipment.