Through improving the classical fuzzy control method, the rules of hierarchical fuzzy control and the model of fuzzy control system which fit computing firing data of ballistic missile put forward, and the arithmetic flow shown. The relation between firing data and the b of fall point difficult to analyze, so there are some difficuties in the course of computing firing data. difficultis. The calculation example shows that the improved fuzzy control methodless iterative time, much less computing time than Newton's iterative method in computing firing data of ballistic missile.