The invention discloses a high-performance heat insulation wallboard which comprises a base layer, an adhering layer, a heat insulation layer, a plastering mortar layer, a fireproof layer, a waterproof layer, a latex layer, a decorative coating and an abrasion-resistant layer which are arranged sequentially from inside to outside. The fireproof layer is made of a fireproof material. The fireproof material comprises, by weight parts, 20-30 parts of urea resin, 5-15 parts of phenolic resin, 5-20 parts of modified polystyrene resin material, 5-15 parts of silica gel, 3-4 parts of glacial acetic acid, 1-2 parts of foaming agent, 1-2 parts of polyacrylamide, 5-10 parts of magnesium hydroxide, 5-10 parts of aluminum hydroxide, 5-15 parts of bauxite, 15-20 parts of clay, 5-10 parts of nano silica, 2-8 parts of aluminosilicate fiber, 5-10 parts of dicalcium silicate, 1-5 parts of monticellite, 5-10 parts of aluminum oxide, 20-26 parts of kaolin, 1.5-2 parts of p-methyl sulfonic acid, 1-3 parts of sulfuric acid, 3-8 parts of paraffin and 10-15 parts of tar. The invention further discloses a method for preparing the fireproof material of the high-performance heat insulation wallboard. The high-performance heat insulation wallboard has heat insulation performance and is excellent in fireproof performance.