Abstract:In the aerospace product research procession, there are many problems to be faced, including knowledge resources scatter, insufficient structuring, lack of systematism etc. Thus the knowledge resource need to be structured to form knowledge model, for the sake of further knowledge discover, analysis and mining. Knowledge model is closely related to the area knowledge belongs. This paper considers the factors including knowledge classification, knowledge elements extraction, elements relation analysis, proposes principal and method of knowledge model construction, taking documental knowledge, software knowledge, and technical drawing knowledge for typical class, describes the construction process as well as detailed instance based on ontology, which can support the formation of whole knowledge system for aerospace product research.