Double-gou flat-textured exterior thermal insulation metal embossed panels and metal exterior fire-resistant 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浮雕 patterns). While forming the insertion sockets at both ends, two middle grooves are also formed on the panel surface. These are then used for fire-resistant, thermal insulation, and soundproofing panels for exterior wall decoration. The panels are primarily installed on exterior walls, giving the finished wall a visually appealing look as if it were made of painted wooden strips assembled together. This polyurethane thermal insulation sandwich panel is widely used in exterior wall decoration of buildings, kiosks, dry-hanging thermal insulation and soundproofing walls, and fire-resistant thermal insulation for lightweight steel villas.