Construction structure and construction system of bridge

The utility model provides a bridge construction structure and system, the bridge is formed by splicing a plurality of steel box girders, the construction structure comprises a plurality of temporary buttresses, a plurality of pushing buttresses, a plurality of pushing assemblies and a plurality of sliding assemblies, the plurality of temporary buttresses are arranged at intervals along the longitudinal direction of the bridge; the plurality of pushing buttresses are arranged at intervals along the longitudinal direction of the bridge and are staggered with the plurality of temporary buttresses; the plurality of pushing assemblies and the plurality of sliding assemblies are correspondingly arranged on the plurality of temporary buttresses and the plurality of pushing buttresses, and are used for pushing and sliding the steel box girder; wherein the plurality of temporary buttresses and the plurality of pushing buttresses form a construction line of the bridge, and the plurality of pushing assemblies and the p