本文从控制单台机床恒温的途径入手，研究座标精度的稳定性。提出了只要基准又与机床定位民间的温差一定，每次检出的座标精度就稳定；同时，根据不同的座标精度等级，阐述了实现座标精度稳定的合理措施。 This article starts from the way of controlling the temperature of a single machine, and studies the stability of coordinate accuracy. As long as the temperature difference between the benchmark and the civil machine locates at a certain level, the coordinate accuracy of each detection is stable. At the same time, according to the different coordinate accuracy grades, the reasonable measures to achieve the coordinate accuracy stability are described.