It refers to the use of high-energy laser beams to irradiate the surface of the workpiece to instantly evaporate or peel off the dirt, rust spots or coatings on the surface, and to effectively remove the surface attachments or surface coatings of the cleaning object at high speed, so as to achieve a clean process. It is a new technology based on the interaction effect of laser and matter. Different from traditional mechanical cleaning method, chemical cleaning method and ultrasonic cleaning method (wet cleaning process), it does not need any CFC organic solvent that destroys the ozone layer, and is pollution-free. , a "green" cleaning technology that is noiseless and harmless to the human body and the environment.