Hydraulic poppet valve’s “Spool-Spring” structure has low damping characteristics and that makes the dynamic characteristics of the system poor.To reduce vibration,a new type of poppet valve with bypass damper in front of spool was proposed and its mathematical model was established.The influences of the new structure parameters on the vibration characteristics of the poppet valve were analyzed based on Simulink.The results show that parameters such as flow,damping aperture,cone angle and poppet valve aperture have a certain influence on the vibration of poppet valve and some parameters can cause high frequency vibration when they are too small,for example,flow.