The invention discloses a rotational molding steel ring plastic composite pipe material and a manufacturing method thereof; the wave crest of a sylphon bellowss body (1) is packed with a steel ring (2); the manufacturing method is divided into the steps of mold (3) manufacture, coating mold release agent, steel ring surface treatment, raw material weight calculation, material filling and mold closing, rotating heating insulation, cooling, mold release, modification, inspection, finished products into warehouse, etc., so as to obtain the composite pipe material. The rotational molding steel ring plastic composite pipe material is combined with the steel ring; the plastic pipe body and the steel ring can be organically integrated into a whole, taking the advantage to make up for the deficiency so as to obtain double win, thereby not only meeting the needs of stiffness and strength of a large-caliber pipeline, but also meeting the needs of corrosion protection and service life prolonging, and manufacturing pipe material with arbitrary ring stiffness and diameter; the rotational molding steel ring plastic composite pipe material has small production equipment investment, easy equipment maintenance, high raw material using rate and almost no waste generation, reaches organic unification of pipe material cost and rigidity, and manufactures a buried pipe material with appropriate cost, arbitrary large caliber, self-taking mouthing and mouthing socket connection.