High-temperature heat-insulation energy-saving coating as well as preparation method and application thereof

The invention discloses a high-temperature heat-insulation energy-saving coating and a preparation method and application thereof, and the high-temperature heat-insulation energy-saving coating comprises the following components in parts by mass: 20-30 parts of lanthanum cerium oxide, 20-30 parts of rare earth phosphate, 40-60 parts of a composite binder, 20-30 parts of water and 0.1-0.5 part of a dispersant. The coating is sprayed on the furnace wall of the high-temperature kiln to form a coating, the heat conductivity coefficient of the coating is smaller than or equal to 1.0 W/(m.K), and the infrared full-wavelength emissivity is larger than or equal to 0.95. The high-temperature heat-insulation energy-saving coating can be used at the temperature of 800-1600 DEG C, the heat conductivity coefficient of the coating is low, heat dissipation of heat in a furnace through a furnace wall is reduced, the infrared emissivity is high, radiation heat transfer in the furnace can be enhanced, the energy consumption of