The steel formwork is mainly composed of steel plates, angular split bolts and reinforced back ribs. It has the characteristics of large overall stiffness, convenient disassembly and assembly, good appearance quality and so on. In order to make the concrete surface smooth and smooth, the whole steel plate is used during blanking, and the flatness of the formwork surface is. In this way, it can be demoulded, easy to install, and can be used for many times, which provides convenience for customers.