The invention relates to a color nano reflection cooling coating used for roads and a preparation method of the coating, and belongs to the technical field of building materials used for road engineering. The coating comprises a film-forming base material and a film-forming auxiliary agent; and specially the coating at least comprises the following raw materials, in parts by mass: 30-60 parts of epoxy resin, 20-50 parts of a near-red-light nano pigment filler, and 1-5 parts of other auxiliary materials, wherein transparent epoxy resin and a polyamide resin curing agent are added into the epoxyresin, and the other auxiliary agents include a water-based defoaming agent, a polyurethane levelling agent, a polycarboxylate sodium salt dispersing agent and the film-forming auxiliary agent. Compared with the prior art, the method provided by the invention utilizes high reflectivity of the nano material to improve solar spectral reflectance of the coating from a full frequency spectrum opticalangle, and the coating can provide a plurality of colors and reduce temperature when applied to a road surface.