A static seal life assessment method was discussed based on static sealing mechanism,combined with finite element analysis method and accelerated aging test and timetemperature equivalent principle.The maximum contact pressure is greater than the critical contact pressure as the failure evaluation criterion.The method firstly determines the simulated failure boundary of the gasket by experiment,determines the critical contact pressure of the sealing gasket to achieve the sealing function,and uses it as the determination parameter of the life assessment;then,through the accelerated aging test,the aging model of the gasket is fitted and then predicts the contact pressure after aging under working conditions;finally,the seal life is evaluated by comparing the critical contact pressure and the contact pressure after aging.Taking a gasket with a service life of 10 years at 65 ℃ as an example,the method and steps of life prediction were introduced.The predicted service life of the method is basically consistent with the simulation results of the bench,verifying the validity of the static seal life assessment method.