The invention relates to a preparation method for a gold plating on the surface of a silicon carbide particle reinforced aluminum-based composite material, and belongs to the technical field of surface engineering. The preparation method comprises the following steps that pretreatment is performed on the silicon carbide particle reinforced aluminum-based composite material; micro-arc oxidation isperformed on the pretreated silicon carbide particle reinforced aluminum-based composite material; surface sensitization, activation and reduction treatment is performed on the material subjected to the micro-arc oxidation; chemical nickel plating is performed on the surface of the material to obtain the material with a nickel layer; and gold plating is performed on the surface of the nickel layerto obtain the gold plating located on the surface of the silicon carbide particle reinforced aluminum-based composite material. According to the preparation method, a ceramic membrane layer is formed, so that the homogenization of chemical properties of an interface of the high-volume-fraction SiCp/Al composite material is realized, it is guaranteed that the subsequent plating is uniform in crystallization, then the porosity of the subsequent plating is reduced, and the compactness of the plating is improved.