The invention discloses heat-preservation real stone paint and a preparation method thereof. The heat-preservation real stone paint is prepared by adding 10 to 15 parts of emulsion, 70 to 75 parts ofnatural colored sand, 20 to 60 parts of phase-change microcapsules, 5 to 20 parts of foamed microspheres, 1 to 7 parts of an organic silicon auxiliary agent, 0.1 to 0.5 part of a cellulose ether typecompound and 0.3 to 0.8 part of a film forming auxiliary agent into 10 to 20 parts of water. According to the heat-preservation real stone paint disclosed by the invention, the foamed microspheres andthe phase-change microcapsules are added into the real stone paint so that the temperature control effect is improved; meanwhile, the foamed microspheres have relatively high dispersity, flowabilityand bonding strength in the real stone paint so that the heat-preservation real stone paint can be used in a high-humidity environment and has relatively strong paint film stain-resisting performance.