Composite insulation board

The invention discloses a composite insulation board. The composite insulation board comprises the following components: limestone, phenolic resin, polyester amine, nano zinc oxide, an organic material water repellent, a plaster foaming agent, aluminum sulfate, an aqueous solution, petroleum sulfur aluminum and a curing agent. The raw materials comprise the following components in parts by weight: 30-80 parts of limestone, 40-60 parts of phenolic resin, 10-15 parts of polyurethane, 3-6 parts of nano zinc oxide, 0.8-1.6 parts of organic material water repellent, 5-10 parts of plaster foaming agent, 12-15 parts of aluminum sulfate, 30-40 parts of aqueous solution, 7-15 parts of petroleum sulfur aluminum and 16-35 parts of curing agent. The composite insulation board disclosed by the invention has the characteristics of light weight, high hardness and durability, and has high thermal insulation performance of organic materials; and the composite insulation board is easy to install, and has the advantages of both organic and inorganic materials, so that functional advantages of the composite insulation board can be improved.