Abstract: The non-isothermal differential scanning calorimetry (DSC) technique was used to study the cure kinetics of the resin system for the CFRP pressure vessel. The activation energy of the resin system was estimated by the isoconversional method. The reaction mechanism was assumed to subject to an autocatalytic equation. The interval method presented in this paper was used to establish a cure kinetics model for the resin system. According to the temperature test during the curing process, the result calculated using the cure kinetics model shows a good match with the experimental data, which indicates that the cure kinetic model established by the interval method can present a necessary sub-model for simulating the temperature and residual stress fields of the CFRP pressure vessel with an ultrathin metallic liner.