Double-gou flat texture exterior wall thermal insulation metal embossed panels and metal exterior wall fireproof decorative panels are made by directly feeding aluminum-zinc steel coils into the cold bending forming machine without passing through a metal embossing machine (smooth surface, no raised patterns). While forming the ends with interlocking sockets, two middle grooves are formed on the panel surface. These are then used as fire-resistant, insulating, and soundproof boards for exterior wall decoration. The panels are primarily installed on exterior walls, giving the appearance of painted wooden strips assembled together after completion, which is very aesthetically pleasing. This polyurethane insulated sandwich panel is widely used in exterior wall decoration of buildings, kiosks, dry-hanging insulating and soundproof walls, and fire-resistant thermal insulation for lightweight steel villas.