Cleaning is the removal of surface liquid and solid pollutants, so that the surface up to a certain degree of cleanliness. Cleaning process is cleaning media, pollutants, surface interaction between the three, is a complex physical, chemical role in the process. Cleaning and pollutants not only the nature, type, shape and the extent of the adhesion, and the physical and chemical properties of the medium washing, cleaning performance, the workpiece material, surface, but also to clean conditions such as temperature, pressure and additional ultrasound Vibration, machinery and other external factors. Therefore, the choice of a scientific and rational cleaning process, the need for process analysis.