In order to improve generality and reuse design of ballistic missile simulation system, on the basis of analyzing the system function and technological process, the system design requirements description model and structure model were constructed by using the UML static modeling technology, and the behavior model was constructed by using the method of dynamic modeling. On the basis of the above model, the general hardware and software architecture of ballistic missile accuracy simulation system and an application example were designed. Applications shows that, the method not only emphasizes the common design of ballistic missile accuracy simulation system, but also takes into account different types and application requirements, and effectively improves the efficiency, generality and reuse of the system design.