The air purification grade of ultra-precision machining must reach 100~10000 grade. Cleaning is the most common way of air purification. The processing workshop after purification is called clean room and super clean room. Generally speaking, there are two main types of purification, one is overall purification, the other is local purification. Local purification is economical, through the positive pressure of clean air into the workbench and other local processing area, prevent the inflow of external air, to achieve purification. Due to the staff's hair, work clothes and so on May bring dust, before entering the work, the staff must clean the outdoor replacement of special clothes, wet by the wind, effectively avoid the impact of dust on the quality of processing.

The influence analysis of machining mechanism is that new technologies and new equipment keep emerging in recent years, and the research on precision machining should be strengthened constantly to explore new processing methods. In terms of traditional processing, ultra-precision machining, precision high-speed machining, precision grinding belt grinding and abrasive machining of diamond tools have achieved good results; From the perspective of non-traditional processing, laser beam, electron beam, ion beam and other high energy beam precision processing, ultrasonic processing, electric discharge processing and electrochemical processing have obvious advantages, especially the application of combined processing, such as ultrasonic honing, electrolytic grinding and other technologies, the significance of the breakthrough development is mainly manifested in the clear proposed removal processing, The effective integration of machining and deformation machining, especially the advantage of superposition machining rapid prototyping, plays an important role in promoting the development of machining technology.