To effectively improve the ability of material application and management in aircraft parts designing，and ensure the rapid development of new aircraft designing. By analyzing the current state of material application in aircraft parts designing, the application problems in designing are pointed out, the technical contents have to focused and working procedure ought to followed that used for material selection and substituting are put forward. Furthermore, a technical management procedure about material selection and substituting that apply to the aircraft parts designing are established. Finally, the example of material selection for sealing materials of a certain military aircraft structure and the material substitution for conductive gasket in the electrical system prove the effectiveness of this method. At the same time, it will also provide relevant reference for related enterprises in the aviation field and other fields.