Box beam mold

The invention discloses a box beam mold. The box beam mold comprises an outer mold and an inner mold located in the outer mold; the outer mold comprises two outer mold plates, two groups of supportingstructures and a fixing base, the two outer mold plates are obliquely arranged on the two sides of the fixing base, the lower ends of the two outer mold plates extend downwards to form vertical portions, the upper ends of the two outer mold plates extend in the opposite direction to form horizontal portions, the vertical portions are connected to the fixing base, the two groups of supporting structures are used for supporting the outer mold plates, and the tail ends of the horizontal portions are connected with vertical plates arranged on the upper portions of the supporting structures; and the inner mold is shaped like an inverted trapezoid in the fracture surface, an upper left mold plate and a lower left mold plate of the inner mold are hinged to form a C-shaped structure with a rightward opening in the fractu