In order to explore the influence of different structure and operating parameters on the performance of double lip Y-shaped seal and the optimal combination of dynamic sealing parameters，ABAQUS finite element analysis software was used to simulate and analyze the sealing performance of double lip Y-type pull rod seal under static pressure.The influence of parameters on the sealing performance of double lip Y-type pull rod seal was studied by changing the left and right inclination angle,axial position and interference amount of the second inner lip.The effects of working pressure,piston rod running speed and seal roughness on friction torque and leakage of double lip Y-ring were analyzed.The parameters of sealing ring were optimized by Taguchi test design method,and the optimal level of parameters were determined.The results show that with the increase of the interference of the second inner lip,the maximum contact pressure of the two lips increases,while the axial position has no obvious effect on the maximum contact pressure of the second inner lip.When the left inclination angle of the second inner lip is greater than 25° and the right inclination angle is greater than 30°,the maximum contact pressure fluctuation increases significantly.The friction between seal ring and piston rod increases with the increase of seal roughness and sealing pressure,while the reciprocating speed has little effect on the friction.When the roughness is greater than 0.95 μm,the seal leakage occurs,and the net leakage of the seal ring decreases with the increase of sealing pressure.The best combination of dynamic sealing parameters of double lip reciprocating seal studied is working pressure 8 MPa,roughness 0.9 μm and piston rod running speed 10 mm/s.The research results can provide a reference for the seal design of hydraulic cylinder pull rod with small torsion or bending deformation.