Suspended combined support and construction method of large-span cross beam

The invention relates to the technical field of bridge construction, in particular to a suspended combined support and a construction method of a large-span cross.The suspended combined support forms a triangular stable structure through a cross rod, an inclined rod and a supporting rod assembly, a triangular bracket support is hinged to a mounting base, the mounting base is fixed through a climbing cone, and the cross rod assembly is fixed to the mounting base; the original consolidation mode is changed, the stress is simplified, the bending moment of the hinged position is reduced, the mounting and dismounting safety risk is reduced, the mounting and dismounting efficiency is improved, and the influence of welding high-temperature cutting on the quality of concrete is avoided; the triangular bracket supports are matched with the disc buckle support, free adjustment within a certain height is achieved, the combined support can bear force together with poured partial concrete, and the structural strength only