Trackless self-jacking sliding plate dolly

The invention relates to a dolly for transporting large objects, in particular to a dolly for moving large precast products or steel members. The dolly adopts the technical scheme that a trackless self-jacking sliding plate dolly is characterized in that supporting legs are respectively arranged at two ends of a bracket; a moving box is movably arranged on a beam; the lower side of the moving box, namely one sides of the supporting legs, extends out the bracket; the height of the extending part is greater than that of a jacking cylinder which retracts each supporting leg and is positioned on the lower side of the bracket and smaller than that of the jacking cylinder which extends out each supporting leg and is positioned on the lower side of the bracket; a moving supporting piece is arranged on the upper side of the moving box; the moving box is connected with the bracket through the jacking cylinders; and the jacking cylinders achieve the sliding movement of the moving box on the beam. By adopting the scheme