EPS formwork components have various shapes and sizes, adapting to different shapes of the wall. On each component, there are sockets and tongues around the four sides, and there are evenly distributed dovetail grooves on the inner and outer surfaces, which meet the requirements of building modulus and energy-saving standards, and are organically combined with the building structure, construction method and manufacturing process. In the construction process, as long as the direction is aligned, the concave and convex grooves on the surface can be used to achieve a perfect seamless lap joint, avoiding the running of the slurry during the concrete pouring process and ensuring the strength of the concrete.