Preparation method of stain-resistant hardware fitting

The invention relates to the technical field of hardware fittings, and particularly discloses a stain-resistant hardware fitting preparation method which comprises the following steps: step 1, placing a hardware fitting in a cavity, introducing nitrogen, turning on a bias power supply, exciting to form plasma, and then bombarding for 35-45 minutes by adopting plasma at the bias power of 65-75W. The spherical nanometer aluminum oxide composite layer can be matched with the metal oxide layer, the anti-corrosion function of the accessory is enhanced, the stain-resistant surface agent is prepared from butyl acetate, phenoxyethanol, silicon carbide and other raw materials, the tension of the surface layer of the accessory is reduced, and the stain-resistant performance of the accessory is improved; and the stain-resistant surface agent is matched with the montmorillonite composite spherical nano aluminum oxide modifier to form a layer structure, so that the stain-resistant surface agent is not easy to delaminate,