Abstract: High temperature dynamic sealing structure is employed in the variable geometry inlets（VGI） with wide-range, and canted coil springs made of supper-alloy wire are the key elastic elements.In this thesis, the following work was finished: At first,parametric modeling was built via mathematical equations.Then finite element method (FEM) analysis based on ANSYS software was conducted, and preliminary resilience characteristics of canted coil spring were obtained.And then, compression rebound performance tests were performed at room temperature and high temperature. After that, the rule of thumb was proposed for design optimization and discussed. Research results showed that:Firstly, the average equivalent stress at the maximum stress plane should be less than 50% yield strength of the material,which was verified as the design guideline for the canted coil springs. Secondly, the mechanical performance of canted coil springs reached the requirements within the specified stroke range, and the rebound elasticity was excellent at room temperature, while it decreased remarkably at 950℃.