The invention provides a graphite phase carbon nitride-graphene compound-modified fluorocarbon finish paint which comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 4:1; the component A is prepared from the following raw materials in parts by weight: 40-70 parts of fluorocarbon resin, 30-40 parts of an organic solvent, 0.5-25 parts of g-C3N4/rGO, 0.1-0.5 part of an antifoaming agent and 0.1-2 parts of a flatting agent; and the component B is a blocked isocyanate curing agent. Graphite phase carbon nitride in a coating can be subjected to photocatalytic reaction under visible light, so that the self-cleaning effect of the coating is achieved. Through addition of graphene, fast separation of a photoelectric electron-hole pair can be achieved, the photocatalytic efficiency and the self-cleaning capability are improved, and the heat dissipation performance of the coating is greatly improved by the high heat conductivity coefficient of the graphene. The graphite phase carbon nitride-graphene compound-modified fluorocarbon finish paint is simple in step, convenient to operate and high in practicability.