Sectional type large-span steel box girder

The utility model discloses a sectional type large-span steel box girder, and relates to the technical field of steel box girders. The utility model comprises: a steel box girder; a through hole for connecting a bolt is formed in the lug plate; the connecting plate is fixedly installed on the steel box girder, a base plate is installed at the bottom of the connecting plate, an included angle of 90 degrees is formed between the base plate and the connecting plate, and a distance difference exists between the end, away from the steel box girder, of the base plate and the end, away from the steel box girder, of the connecting plate. When the lug plate is supported and connected through the base plate, the lug plate is placed on the base plate, the positioning rod is inserted into the through groove, the positioning rod limits the horizontal movement of the lug plate, the positioning rod is connected with the lug plate, meanwhile, the threaded hole is communicated with the through hole, and the lug plate is conne