Heat insulation and preservation composite board and preparation method thereof

A heat insulation and preservation composite board, comprising a first panel layer and a heat insulation and preservation layer, wherein the heat insulation and preservation layer and the first panel layer are integrally formed;

• the first panel layer is selected from the group consisting of a fiber-reinforced resin-based composite sheet, a metal plate, a cement plate, a calcium silicate plate, and a gypsum plate;
• and the heat insulation and preservation layer is a fiber-reinforced aerogel felt;
• in a case that the first panel layer is the fiber-reinforced resin-based composite sheet, a surface of the fiber-reinforced aerogel felt which is in contact with the first panel layer is coated or uncoated with a heat insulation coating;
• in a case that the first panel layer is selected from the group consisting of the metal plate, the cement plate, the calcium silicate plate, and the gypsum plate, the surface of the fiber-reinforced aerogel felt which is in contact with the first panel layer is coated with the heat insulation coating;
• the heat insulation coating consists of a liquid epoxy resin, a heat insulation filler, a curing agent, an enhancer, and a first coupling agent in a mass ratio of 100:(10-50):(20-180):(0.05-3):(0.2-5), or the heat insulation coating consists of an aqueous elastic paint, an aqueous resin, a flame retardant, silicon dioxide powder, a dispersing agent, and a second coupling agent in a mass ratio of (30-60):(10-30):(2-5):(5-40):(0.5-5):(1-5).