In order to improve the sealing performance of metallic Wring used in aviation engine,taking a metallic Wring as research subject,a twodimensional axisymmetric finite element model was established,and the correctness of the simulation model was verified by the simulation and experiment of the axial stiffness.The APDL language and parametric technique in ANSYS were used to parameterize the design dimensions of the Wring structure.With the purpose of increasing the contact stress between the sealing ring and the flange,the structural parameters of the metal sealing ring was optimized by using the ANSYS zeroorder optimization algorithm,and the optimum crosssectional dimensions were obtained.The results show that after optimization,the wall thickness and the height of the metallic Wring are reduced,while the maximum contact stress is increased by 8.8%,the maximum VonMises stress is reduced by 4.3%,so the sealing performance and service life of metal sealing ring can be improved.After optimization,the axial stiffness of the metallic Wring is decreases by only 32%,which has little effect on the mechanical properties.