Metallic embossing composite insulation panel is called WL wall panel for short, composed by the external metallic embossing panel and thermal insulation materials. Employing the aluminum alloy panel, steel panel plated with zinc and aluminum and other metallic panels, and with its surface coated with special coating materials of various colors, WL wall panel is rolled to carry different patterns by special equipments or treated to be of various colors by means of a second coating to satisfy the requirements for appearance of architectural modeling and colors and to reach certain artistic effects, such as brick pattern, bullet pattern, waterwave pattern, wooden pattern, gravel pattern and fine gravel patterns. The thermal preservation and insulation material of WL wall panel employs XPS or EPS foams, PU or PIR foams and other materials.