It is a new type of building board with various steel plates as the surface and floor, filled with rock wool or glass wool insulation materials, pressed and compounded by special equipment or added with PU automatic foaming and pressure curing. The utility model has the advantages of heat insulation, rich colors, sound insulation, sound absorption, quick installation, recycling, screw hiding, etc. The board itself is wave like, with high strength, and automatic foaming polyurethane edge sealing can be added on both sides of the board vertically, which not only improves the strength again, but also prevents the use effect from being affected by the penetration of rainwater into rock wool. The board is especially suitable for large buildings with high requirements of waterproof and thermal insulation.