Laser cleaning rapidly removes residues of insulating resin, vulcanized carbon deposits, grease, oxide layers and release agent contaminants on medium high voltage switch mould surfaces.The cleaning process is precise and controllable, without damaging mould cavity precision, sealing surfaces, textures or base material hardness. It avoids impact damage from sandblasting, chemical corrosion and dust pollution.Online cleaning can be carried out without disassembling the moulds, delivering high cleanliness and excellent uniformity. It suits daily maintenance and refurbishment of various medium high voltage switch moulds including plastic moulds, die-casting moulds and insulating part forming moulds. The technology effectively improves product forming quality and extends mould service life.