The invention discloses a high-radiation heat-insulated coating which comprises the following components in parts by weight: 25-37 parts of infrared reflection pigments, 12-20 parts of aluminum-coated hollow microspheres, 15-28 parts of aerogel, 30-55 parts of organic resin, 0.1-0.2 part of a wetter, 0.36-0.47 part of a dispersant, 0.3-0.9 part of a defoamer, 0.02-0.1 part of a preservative, 0.02-0.1 part of a mildew preventive, 0.52-1.12 parts of a thickener, 1.2-2.4 parts of a film-forming aid and 0.03-0.18 part of a pH value regulator. The coating is provided with a plurality of photo-thermal reflection layers and heat-insulated barriers, has a good heat-insulated effect capable of reaching more than 98%, and is excellent in mechanical performance, large in adhesive force, good in weather resistance, water resistance, stain resistance, scrub resistance and the like, safe, environment-friendly and wide in application range.