Silicon calcium wire is an additive in steelmaking, which is beneficial to adjust and control the content of easily oxidized elements and trace elements, can significantly increase the alloy yield, reduce smelting costs, shorten smelting time, and accurately control the composition. It can purify molten steel and partially change the properties and morphology of inclusions, improve the quality of molten steel and improve the casting state. It is mainly composed of silicate cement and inorganic reinforcing materials, has excellent crack resistance and durability, and is suitable for crack resistance reinforcement and waterproofing in various building structures.