Box culvert formwork supporting system

The utility model discloses a box culvert formwork supporting system. The box culvert formwork supporting system comprises a side slope; the box culvert is located on the rock base layer on the side slope side; the formwork A is mounted on the outer side of the box culvert close to the side slope side; the template A is supported on the side slope through the inclined struts; the formwork B is installed on the inner face of the box culvert located on the side of the formwork A, and the formwork B and the formwork A are installed, pulled and fixed through a sleeve and a penetrating bolt; and the component force supporting frame is located in the box culvert, and the component force supporting frame is supported in the formwork B and the box culvert for point-division supporting. The falling foreign matter on the side slope collides with the formwork A supported by the inclined strut at first, the formwork A distributes and disperses force to the formwork B through the sleeve and the opposite-penetrating bolt,