Opening steel box concrete beam construction method and structure

The invention discloses an open steel box concrete beam construction method and structure. The method comprises the steps that a box-shaped steel beam is installed; a lower U-shaped hoop is placed on the periphery of the bottom of the box-shaped steel beam, a lower reinforcement cage is formed in the bottom area of the box-shaped steel beam in a binding mode, and bottom concrete is poured; a middle reinforcement cage is bound in the middle area of the box-shaped steel beam, and middle concrete is poured; an upper reinforcement cage is bound to the upper area of the box-shaped steel beam, upper U-shaped hoops are inserted into the periphery of the upper reinforcement cage and the periphery of the top of the box-shaped steel beam and welded and fixed, and the lap joint length and the welding length both need to meet the anchoring length of the tensile steel bars; and binding reinforcing steel bars in the floor slab to finish upper concrete pouring. According to the construction method, the inner construction ch