Large-span steel-concrete lagging jack structure for civil building and construction method of large-span steel-concrete lagging jack structure

The invention discloses a large-span steel-concrete lagging jack structure for civil buildings and a construction method of the large-span steel-concrete lagging jack structure. According to the large-span steel-concrete lagging jack structure, at least two arch foot nodes are arranged on a support cylinder, and at least two floors of floors, arch ribs and arch bottom pull rods corresponding to arch foot node pairs, under-arch hanging rods and on-arch supporting rods are adopted to form a suspended connecting body, two support cylinders are used as a vertical bearing system and a horizontal lateral force resisting system, the stress principle of an arch is utilized, all floor systems are vertically supported by arch ribs and provide lateral stable constraint for the arch ribs in turn, steel trusses of all floor systems can effectively transmit horizontal force to the support cylinders at the two ends of the steel trusses, so that the horizontal force of the steel trusses is effectively transmitted to the supp