Regarding the problems of compacting mechanism and construction parameter optimization of high-frequency hydraulic vibration compaction riprap foundation bed，a reasonable particle discrete element model is established based on the conditions and results of vibration compaction test.The rammed settlement，the void ratio and the vertical stress of the foundation bed are analyzed，and the influence of the vibration response of the foundation bed under different excitation forces and vibration frequencies is analyzed.The results show that：1) At the initial stage，the amount of rammed settlement increases rapidly，and then gradually tends to smooth.The vertical stress of riprap bed under vibro-ramming has a linear change along the depth.2) When the maximum exciting force is 150 kPa，the shallow subgrade of the foundation bed has a good compaction effect.But for the deep stone foundation bed，the greater the exciting force，the better the compaction effect，that is，the maximum exciting force is 200 kPa.3) For the stones in different depth of the foundation bed，the vibration frequency of 25 Hz can achieve a good vibration compaction effect.