Bridge steel box girder mounting and positioning device

The utility model relates to the technical field of steel box girder installation and positioning, and particularly discloses a bridge steel box girder installation and positioning device which comprises a first bottom plate and a second bottom plate, an electric capstan is installed on the upper surface of the second bottom plate, and an installation ring is installed at the end, close to the electric capstan, of the upper surface of the first bottom plate. A plurality of tension and pressure sensors are mounted on the outer ring surface of the mounting ring; according to the utility model, the external crane can be controlled to move the steel box girder to the position when the numerical value of the tension and pressure sensor is increased until the hoisted steel box girder and the installed steel box girder are aligned, so that the positioning treatment of the steel box girder during hoisting is completed, and due to the fact that laser is not needed in the scheme, the cost is reduced, and the working ef