According to the characteristics of industry chain, divides steel-auto industry chain from core business and value-added into steel unit, trade unit, storage unit, machining unit, auto unit and general service unit. On this basis, the whole realization process of product resource collaborative services of steel-auto industry chain is illustrated, including the digital model of product resource, formalization description, capsulation and invoking. At last, the structure of collaborative information platform of steel-auto industry chain is put forward..