The thermal characteristics of vertical CNC Lathes are one of the important factors that affect the machining accuracy. Due to the speed of the vertical CNC Lathe, the feed speed is much higher than that of the ordinary machine tool. The hot cutting effect caused by the large cutting amount has much more influence on the heat conduction of the workpiece and the machine tool parts than the ordinary machine tool, and the influence of the thermal deformation on the machining precision is often difficult Operator correction. Therefore, measures to reduce the thermal deformation of CNC Lathes should be given special attention.