The invention relates to the technical field of steel structure and wood rafter connection, and discloses a steel structure antique roof structure. The steel structure antique roof structure is provided with connected joints of two up-and-down adjacent wood rafters and roof steel beams, two ends of the wood rafters are respectively fixed with the roof steel beams through first adapting pieces; thefirst adapting pieces are structural steel with an inverted-T-shaped cross-section shape and are arranged in a full length mode along the roof steel beams in the length direction; the steel structureantique roof structure also comprises a connected joint of the wood rafter, a fly rafter and an eave steel beam, and the connecting end of the fly rafter is fixed to the wood rafter through connecting arms; a connecting arm I is fixedly connected with the fly rafter, and the connecting arm II is fixedly connected with the wood rafter; the steel structure antique roof structure also comprises a connected joint of two wood rafters at two sides of a ridge and a ridge steel beam, and a third adapting piece comprises two angle irons with openings oppositely arranged, and a ridge wood beam is arranged between the two angle irons in a fitting mode; and the wood rafters are fixedly connected with the ridge wood beam. The steel structure antique roof structure is simple in structure, and convenient to construct; and soundness of the connection between the wood rafters and the steel structure is high, and the integrating degree of the connected joints is high.