The invention belongs to the technical field of a coating and a preparation method thereof, and discloses a heat-insulation coating and a production method of the heat-insulation coating. The main technical characteristics are that the heat-insulation coating contains the following materials according to parts by weigh: 100kg of purified water, 38-42kg of polyvinyl alcohol, 95-108kg of nano ceramic tiny beads of more than 2000 meshes, 18-25kg of silicon and aluminum fiber, 28-34kg of heavy calcium carbonate of more than 1000 meshes, 13-16kg of light calcium carbonate of more than 1000 meshes,1-2kg of flowage assistant agent, 1-2kg of adhesion improver, 0.5-1.5kg of defoamer, and 2-3kg of scratch-resisting agent. By inhibiting and shielding the radiant heat and the heat energy conduction of infrared rays and inhibiting loss of heat radiation and heat energy of high-temperature objects the heat insulation effect can be achieved. Furthermore, cold insulation to low-temperature objects can be realized, and cold energy loss caused by the radiant heat of the environment can be inhibited so as to prevent cold energy loss.