Fireproof and heat insulation plate for outer wall of building

The invention discloses a fireproof and heat insulation plate for an outer wall of a building, which belongs to the technical field of building decorating materials. The fireproof and heat insulation plate comprises a plate body, a first enhancement layer and a second enhancement layer, wherein the first enhancement layer is bonded at one side of the plate body; the second enhancement layer is bonded at the other side of the plate body; the plate body consists of magnesium oxide, magnesium chloride, a foaming agent and polystyrene particles; and the first and second enhancement layers are glass fiber gridding cloth. Due to the adoption of the structure in the technical scheme, the plate body has high overall consistency, the first and the second enhancement layers are combined with the plate body reliably, and the fireproof and heat insulation plate has the advantages of simple structure, convenience in manufacturing, fireproof level A, safety, good heat insulation effect and contribution to energy conservation of buildings.