Installation assembly and construction method for large-span overhanging special-shaped component of complex steel structure roof

The invention discloses a complex steel structure roof large-span overhanging special-shaped component installation assembly and a construction method, the complex steel structure roof large-span overhanging special-shaped component installation assembly comprises a plurality of sets of supporting columns, a connecting beam erected on the supporting columns and an overhanging beam installed on the connecting beam, and the complex steel structure roof large-span overhanging special-shaped component installation assembly further comprises a movable positioning unit arranged on the connecting beam; the adjusting unit is arranged on the movable positioning unit, the movable positioning unit is arranged on the connecting beam and used in cooperation with the adjusting unit, the position of the cantilever beam can be quickly positioned, and the cantilever beam can be quickly adjusted before the cantilever beam and the connecting beam are fixedly installed in a butt joint mode. The horizontal and vertical angles of