In this paper, to study the metal spring properties of high temperature sealing components, a parametric model of braided spring tube was established based on the characteristics of the Boeing’s braided spring and Streck cardiac stent, and the spring diameter formula are deduced. AUTODESK 3D-MAX was used to simulate braid spring, the effects of spring diameter, density, and method are studied. The results show that increasing the diameter of spring wire, reducing the density of woven springs in the axial direction，increasing the circumferential density of woven springs, and the way of the spring tube which is woven outside can improve the elasticity of spring tube.