Steel box girder

The utility model discloses a steel box girder, which relates to the field of bridge members and comprises a steel box girder body, a hanging block and a connecting piece, the steel box girder body comprises two connecting ends arranged along the length direction, each connecting end is provided with a mounting groove and a positioning groove, and the mounting groove of one connecting end and the positioning groove of the other connecting end are positioned on the same straight line. The straight line is in the length direction; the hoisting block is rotationally connected to the groove wall of the mounting groove through a rotating shaft, can move between a hoisting position and a positioning position, and is provided with a through hole; the connecting piece is arranged between the hanging block and the steel box girder body; wherein at the hoisting position, the through hole is formed in the upper part of the steel box girder body; at the positioning position, the hanging blocks are exposed out of the stee