The steel structure enclosure system includes roofing system, wall system, lighting belt, edging and flooding, gutter and thermal insulation cotton. The enclosure system is one of the most important components of the light steel structure, which determines the ornamental appearance of the building, the waterproof and thermal insulation effect of the building. As an auxiliary fastener, self-drilling self-tapping screws play a vital role in the performance, quality and life of the overall building. It is not optimistic that as such an important basic component, our attention and research are far behind the attention and research on the main components of the building. The most prominent point is the neglect of the performance of fasteners and the main components of the building envelope system. match.