In order to study the dynamic characteristics of steel wheel vibration,vibration hydraulic system pressure and driving torque with the change of compaction degree under actual compaction conditions,the flexible pavement model was established by ANSYS APDL,and the rigid-flexible coupling dynamic modeling of steel wheel and pavement was carried out in Adams.The co-simulation model of vibratory hydraulic system of single steel wheel vibratory roller was established by AMESim and Adams,and the compaction simulation under different compaction degree was carried out.The results show that the simulation model is accurate;with the increase of compacting degree,the vibration of steel wheel is prone to double frequency and jump vibration,the steady pressure of vibration hydraulic system decreases,the vibration onset time is shortened,and the driving torque is reduced.