Taking the high pressure riveting plug as the research object,the parametric 3D model of the riveting plug and the plug body was built by using Pro/E.The finite element analysis related to the plastic deformation was carried out by importing the parametric 3D model into the DEFORM2D.According to the principle of static sealing,the line pressure accumulating method and area comparison method were proposed to judge the sealing performance of riveting plug.And by comparing the advantages and disadvantages of the two methods,the area comparison method was adopted as the judgment standard of the riveting plug sealing performance.With different sizes of the high pressure riveting plug,the target variable was optimized by using the variable control method,and the lattice elimination method was used to optimize the size of each target variable.The optimal size of each target was obtained so that the sealing performance of the riveting plug is relatively optimal.By comparing the simulation results before and after optimization,it is found that the sealing performance of the optimized riveting plug is improved by 20.25% compared to the initial riveting plug.