▎ 摘　　要

NOVELTY - Preparation of surface micro-nano composite structure, involves fixing workpiece to be processed on six-dimensional moving platform through ultrasonically vibrating in additive device and laser processing light path, generating micro-texture on surface of workpiece to-be-processed by laser and ultrasonically vibrating, finishing processing, ultrasonically cleaning workpiece with ethanol solution and ultrasonically cleaning, obtaining processed workpiece (W1), preparing poly-dopamine solution, feeding workpiece (W1) in poly-dopamine solution, stirring and leaving undisturbed for 12 hours, taking out and ultrasonically cleaning with ethanol solution, obtaining processed workpiece (W2), preparing graphene oxide solution, soaking workpiece (W2) in graphene oxide solution for 12 hours, taking out and drying in drier, ultrasonically cleaning with ethanol solution and obtaining the workpiece (W3). USE - Preparation of surface micro-nano composite structure. ADVANTAGE - The method improves stability and corrosion resistance of workpiece surface, and prolongs service life of workpiece.