Multipurpose bridge deck crane all-in-one machine

The invention provides a multipurpose bridge deck crane all-in-one machine which comprises a truss mechanism, a second hoisting mechanism used for hoisting a steel box girder is installed on the surface of the truss mechanism, and the surface of the truss mechanism is in sliding connection with a first hoisting mechanism used for hoisting a prefabricated bridge deck slab and positioning the steel box girder. A sliding mechanism is mounted on the side wall of the first hoisting mechanism; the side wall of the steel box girder is provided with a positioning mechanism used for driving and assisting in hoisting and positioning of the steel box girder. A limiting mechanism used for fixing the positioning plate is arranged in the first mounting plate, an adjusting mechanism used for finely adjusting the position of the steel box girder is arranged on the surface of the positioning plate and comprises a fixing plate, and the two ends of a high-pressure air bag are fixedly connected with the fixing plate and a rubber