Formwork for concrete pouring at assembly type beam-column joint and installation method of formwork

The invention relates to a formwork for concrete pouring at a fabricated beam-column joint and a mounting method of the formwork. The formwork comprises a bottom formwork, a top formwork and a bottom formwork, the two side dies are respectively connected with the bottom die to form a concave groove for pouring concrete; the fixing rods are fixed on the side molds; the fastening screws are connected with the two side molds and are close to the upper part of the concave groove; the formwork is a steel formwork, the steel formwork is high in strength, not prone to formwork expansion and deformation, capable of being used repeatedly, good in economic benefit and more convenient to mount and demount, the construction requirements of beams with various sections can be met, and the steel formwork can also be used in a common PC beam column joint and a beam column system assembly type structure joint with a steel connector. Meanwhile, the fastening screw rod used for connecting the two side formworks is close to the