Abstract: Eight carbon fiber reinforced plastics (CFRP) pressure vessels were manufactured according to GJB 1878-94 and experiments were conducted to obtain the probabilistic dist ribution of design variables，such as the fiber strength，winding angle，geometric size，burst strength and so on. The reliability design for solid rocket motor vessels based on the experimental data was compared with the traditional safety factor design. The results show that the reliability design of CFRP solid rocket motor vessel effectively unitized the safety and requirements of composite vessel design. The variance level of burst strength of CFRP solid rocket motor vessel is influenced by the variance level of some variables，such as fiber strength，winding angle，geometric size. And not only the variance level of winding angle，but also the mean value of the winding angle influence the variance level of the burst strength.