Box girder template is a special non-standard equipment for making box girder, which plays a great role in controlling the production speed and surface quality of box girder. Most of the initial formwork was made of loose wood panels. At present, due to the rapid development of the national economy, the construction of railways and highways has developed rapidly. The large-scale bridges have forced the extensive use of steel formwork in the prefabrication of bridges. Steel formwork box girder The template has the characteristics of less seams, high rigidity, and flat surface. Although the traditional assembled steel formwork box beam formwork also has the characteristics of fewer seams, high rigidity, and flat surface, the erection and demolding of the formwork are all manually installed and disassembled, requiring a lot of manpower and low construction efficiency. This makes the liquid template come into being. The hydraulic system is used to control the erecting and closing of the template, and there is a special spreader for lifting, which saves a lot of labor, greatly improves the construction efficiency and shortens the construction period.