Precise machining accuracy is one of the measure of a country manufacturing technology level of important symbol, and in it with the increasingly high precision processing, machining parts of machine tools are required to the surrounding environment more and more is also high, and in precision machining, in addition to the hydraulic pressure source fluctuation, influence of environment temperature and cleanness and vibration and other aspects of the processing quality is great, therefore, if people want to reduce the influence factors of precision machining parts, mainly from the aspects of air pressure fluctuation, temperature changes, and the external self vibration of several main factors to pay attention to.