Steel box girder splicing and positioning structure

The utility model belongs to the technical field of steel box girder construction, and particularly relates to a steel box girder assembly positioning structure which comprises a first base, a first lifting plate and a first driving piece used for driving the first lifting plate to ascend and descend, the first driving piece is fixedly installed on the first base, and a horizontal positioning plate is horizontally and slidably connected to the first lifting plate. A second driving piece used for driving the horizontal positioning plate to slide in the width direction of the steel box girder is fixedly installed on the first lifting plate, and a vertical positioning plate is fixedly connected to the horizontal positioning plate and horizontally arranged. The horizontal positioning plate is attached to the side face of the installed steel box girder through the second driving piece, the vertical positioning plate is attached to the top face of the installed steel box girder through the first driving piece, and