Composite multilayer board with fireproof function

The utility model relates to the technical field of composite multilayer boards, and discloses a composite multilayer board with a fireproof function, which comprises a panel, a heat insulation core board and a back board, the heat insulation core board is movably attached to the bottom surface of the panel, the back board is movably arranged on one side of the heat insulation core board far away from the panel, an upper mounting hole is formed in the surface of the panel, and a lower mounting hole is formed in the surface of the panel. According to the composite multi-layer board, through the arrangement of the heat insulation core board, the reinforced flame-retardant layer and the latex fireproof coating, the latex fireproof coating made of acrylic latex can form a first fireproof flame-retardant barrier for the composite multi-layer board, so that the composite multi-layer board has the advantages that the heat insulation core board, the reinforced flame-retardant layer and the latex fireproof coating are