Bridge deck crane

The utility model discloses a deck crane. The crane comprises a main beam assembly, a cart travelling mechanism, a longitudinal travelling trolley, a hoisting mechanism and a lifting appliance mechanism, wherein the main beam assembly comprises two side main beams which correspond to each other left and right, a plurality of fixed connecting seats are fixed on the opposite wall surfaces of the twoside main beams, the two ends of a plurality of connecting beams are fixedly connected to the corresponding fixed connecting seats through bolts, and a plurality of lower supporting legs are fixed onthe bottom surfaces of the two side main beams; the device can be installed on a bridge above a bridge pier. The device can move in the front direction and the rear direction. A mounting beam placednear a pier can be grabbed and moved to a mounting position for mounting; a beam feeding mechanism and the like are not needed for beam feeding, the lifting appliance mechanism adopts three-point lifting, the lifting stability