In order to solve the problem of large amount of design work caused by the section control dimension of oil seal,the modular design method of skeleton oil seal was studied.Through the configuration design of skeleton oil seal structure module,the seal support department,mainlip and vicelip configuration of oil seal was realized,so as to different structure form of seal products can be formed fastly.Through the parameterization and serialization design for the important features of the skeleton oil seal and the local characteristics,the parameterization design of oil seal product structure that meets the specific requirements of the sealing performance was realized.The modular design method of the oil seal to use the oil seal modularization based on feature and parametric configuration design system was developed,which improves the working efficiency and accuracy of the design.