At the same time, it can replace the original clay tile, cement tile, color steel plate, glass fiber asphalt tile, SLATE tile, etc. At the same time of construction, it is unnecessary to remove the original roof, which can be directly constructed. Due to the large surface area of the metal tile, light weight, can be bent, cutting, through the use of a unique buckle design and structure and horizontal napping, mutual connection fixed firm. This kind of dry construction, simple and fast, save materials.