Abstract: The present paper describes the interaction of the missile with the solid rocket-ramjet.A method for integrated design is also prenseted. In this paper the missile launching weight and the theoretical miss distance are taken as design criteria. The principal missile parameters and the area ratios of the rocket-ramjet structure can be determined by applying the multi-objective programming theory.The method and program developed in this study can de used for missile Conceptual design and for further design modification.