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To meet the“generalization, combination, series”design requirements of new launch vehicle and for purpose of reducing costs and increasing benefits, study on the multidiscipline integration design method is necessary. Sorting out the engineering algorithms in disciplines of Overall Design, Air Dynamic, Trajectory Design and Attitude Control during concept design, combining with MDO and the software architecture method of hierarchical model management, a multidiscipline integrated and optimized software construction technique is proposed, orienting to launch vehicle concept design, which covers the definition and management on eight types of software models, including the professional model, CAD model, simulation model, optimization model and iteration model. A professional calculation and analysis software is implemented accordingly, with capabilities of parametric design on rocket Core, Booster, Stable Fin and other overall configuration. It supports the calculation and performance analysis of air dynamic based on component combination method, the calculation of mass characteristic, propulsion system selection and trajectory calculation, analysis and optimization. The functionality to display and edit 3D images is also provided. The study and implementation of software constructure technique provides tool support for multidiscipline integration during concept design of launch vehicle.