The utility model belongs to the technical field of the bridge construction, especially, relate to a novel girder steel bridge panel construction formwork support structure, transversely hang roof beam and formwork support including the I -steel, it is a plurality of the I -steel is transversely hung roof beam parallel arrangement and is connected with the steel truss roof beam, is used for supporting formwork support, the steel truss roof beam includes diaphragm roof beam, well roof beam and main girder, the I -steel is transversely hung the roof beam and is connected with and draws rings toone side and hang solder block, draw to one side rings pass through wire rope with diaphragm roof beam and well roof beam suspension connection, hang solder block with main girder hangs the connection. The utility model discloses ground has been satisfied and cast in situ concrete construction full framing atress requirement under the scaffold frame condition can't be set up.