The disassembly-free formwork is a kind of steel mesh without joints. Its mesh and rigid U-shaped section are cut by special professional machines. The mesh surface has no joint holes and special tension. powerful. As early as 1969, it was used in the concrete structures of construction projects in advanced countries such as the United States, Canada, Europe, and Australia, and has been tested and verified by many doctors of building structures such as the British Cement Association and Espa?a building products authority T.A Halson. Traditionally used formwork (such as wooden formwork, steel formwork, etc.) is much superior. Since the disassembly-free formwork has better stress intensity and shape freedom than ordinary formwork, it has a good effect on project quality, structural safety and reducing construction costs. In advanced countries such as Europe, the United States and Australia, it has been widely used in civil engineering of large buildings, such as tunnels, bridges, raft foundations, sewers, subways, retaining walls, nuclear power plants, docks, storage tanks, high-rise buildings, marine engineering and other Regular or curved surface shapes can be used as permanent demolition-free formwork for concrete. It has been widely used in the Three Gorges Project in China.