Laser cleaning is a common metal surface cleaning technology.The attachment on the surface of metal materials often affects the normal operation of the machine.The common ones are oxide film,rust,oil and other impurities.Due to long term exposure to the air,a layer of oxide film is often attached to the cold rolled steel plate used in this paper.With the growth of time,the oxide film will have complex chemical reactions,resulting in more than one oxide film on the surface.The oxide film formed in the working environment,such as ferrous oxide,will oxidize ferrous oxide at high temperature,so the oxide film becomes three layers,namely,Fe2O3,Fe3O4 and Fe2O3.In this paper,a 100W laser cleaning machine with 1064 nm wavelength was used to clean the oxide layer on the surface of cold rolled steel plate.By adjusting the parameters such as power,frequency,scanning speed and scanning times,the surface element content and surface roughness after cleaning were observed.It was found that the laser cleaning effect was better,which was consistent with the base material surface.