As a new kind of lightweight elastic metal structure,the metal rubber seal (MRS) can replace the traditional polymer rubber seal in extreme environment.However,due to the complex structure of MRS and the complicated preparation process,the structural characteristics and mechanical properties of MRS can not be accurately known,which affects the engineering application.In order to solve this problem,based on computer-aided simulation technology,the preparation process of large ring-diameter ratio O-shaped MRS was numerically simulated,and a model was constructed from the perspective of virtual preparation,which can truly reflect the macroscopic mechanical properties and microscopic complex structure of MRS.According to the actual working conditions,the static simulation analysis of the MRS model under different compression conditions was carried out,and the influence of the compression rate on the contact characteristics of the sealing interface and its structural response was analyzed.The results show that the contact characteristics are affected by the working condition of the compression and the plastic failure of the coating layer.With the meso contact stress output by statics simulation as the parameter,combined with the gap flow model,the leakage rate of seals was simulated and calculated,and the influencing factors of leakage rate were analyzed.The results show that the leakage can be reduced by higher compression rate on the premise of no plastic failure of the seal.The research results has certain guiding significance for the parameter design,performance research and application popularization of new high temperature resistant seals.