The invention discloses an aqueous finishing-free high-gloss solid color paint for vehicles. The paint comprises a main film-forming substance, an assistant, deionized water and color paste, and the main film-forming substance comprises an aqueous acrylic acid dispersion, an aqueous polyester resin, a fully methylated amino resin and an aqueous blocked isocyanate; wherein the assistant comprises graphene dispersion liquid, an acid catalyst, a defoaming agent, an aqueous base material wetting agent, a first thickening agent, a second thickening agent, a third thickening agent, a neutralizing agent, an aqueous wetting dispersing agent and a coalescing agent; and the color paste comprises aqueous polyester resin, an aqueous wetting dispersant, a defoaming agent, a neutralizer and a pigment. Graphene is added into a coating; a resin system capable of generating a synergistic effect with graphene is screened out; on the premise of satisfying various physicochemical properties of the traditional aqueous solid color paint for vehicles matched with an oil-based finishing varnish film, the production process of coating the oil varnish on the traditional solid color paint is reduced, the VOCs emission is reduced by more than 95%, the energy consumption is reduced by more than 30%, the working hours are reduced by more than 20%, and the national requirements on energy conservation, emission reduction and consumption reduction are met.