Waterproof insulating plate

The utility model relates to a waterproof heat insulating plate which is suitable for the decoration of house roofs, and the indoor flooring and the exterior walls of a building. The utility model is composed of a heat insulating layer, a reinforcement cage in the middle of the heat insulating layer, a waterproof layer and a waterproof protective layer, wherein, the heat insulating layer is made of cement mortar, perlite, etc.; the reinforcement cage which forms a concrete block together with the heat insulating layer is a reticulate framework which is lapped by orthogonal reinforcing steels and iron wires; the top of the concrete block is the water-proof layer that is coated with chloroprene rubber and other rubber coating materials; the top of the water-proof layer is a waterproof protective layer that is smeared with footstone, sand, mica powder, etc. The utility model has the advantages of good waterproofing property, good heat insulating property, long service life, beautiful appearance, low cost, etc.