Graphene nanoplateles use as thermally conductive fillers, combining with water-based epoxy resin and water-based polyurethane are film-forming substances to prepare water-based heat dissipation coatings. The probability of mutual contact between graphene nanoplatelest is increasing, and an effective heat conduction network is gradually formed, which is conducive to the loss of heat. When the content of graphene nanoplatelet reaches 15%, the thermal conductivity reaches the best; when graphene nanosheets content continues to increase, the dispersion of the coating becomes more difficult, and the fillers are prone to agglomeration, which is not conducive to the transfer of heat, thereby affecting the further improvement of the thermal conductivity of the heat dissipation coating. The heat dissipation coating is a special coating that improves the heat dissipation efficiency of the surface of the object and reduces the temperature of the system.Its preparation method is simple and economical.Solving the heat dissipation problem of electronic products through heat dissipation coatings has become an important direction.