The purpose of precision machining is to achieve machining limits. Over time, with the development of science and technology, this limitation is also changing, requiring long-term exploration and research. Therefore, how to adhere to the "evolutionary machining principle", through the use of mechanical equipment lower than the machining accuracy, the use of advanced technology, computer servo, special measuring tools, directly and indirectly to meet the production needs, directly affect the overall quality of precision machining or ultra-precision machining parts. Obviously, machining mechanism is the foundation of machining mode, is the key to the innovation and development of ultra-precision machining technology and theory, and plays an important role in the overall effect of parts machining. With the development of industrial industry, new technology and new equipment are constantly innovated, and the machining precision level is greatly improved.