The finite element method is used to analyze the nonlinear contact of the wormlike sealing ring in Dn1160 high-pressure sintering furnace. Using Ansys 14.5 to simulate the Von Mises stress under different static. Through the contact deformation, contact stress and the distribution of the stress, the easily crack position and service life of the wormlike sealing ring can be reflected. Then discuss the effects of different system pressure, notch radius, seal clearance, friction coefficient on the sealing performance. So as to evaluate the sealing performance of the wormlike sealing ring.