Parapet wall formwork structure of steel structure roof and construction method of parapet wall formwork structure

The invention discloses a parapet wall formwork structure of a steel structure roof and a construction method of the parapet wall formwork structure. The parapet wall formwork structure of the steel structure roof comprises a roof main steel structure, profiled steel sheets, a plurality of outriggers, a cross beam, a plurality of inclined struts, a plurality of steel stand columns and edge sealing plates, an inner formwork and a fixing structure. The outriggers are a plurality of beams overhung from the roof main steel structure, and the cross beam is connected to the ends, away from the roof main steel structure, of the outriggers; the top ends of the inclined struts are connected to the bottom ends of the ends, away from the roof main structure, of the outriggers in a welded mode, the bottom ends of the inclined struts are connected to the roof main structure in the welded mode, steel bar frames are arranged among the steel stand columns, the edge sealing plates are L-shaped, and the bottom edges of the edg