Abstract: The resonance compaction of deep silty sand ground was simulated using a particle discrete element method, The behaviors of properties of the porosity, displacement and pore pressure in soil were analyzed during the process of resonance compaction, and the mechanical characters of soils around a vibrio-rod were researched. Simultaneously, the effects of the vibration frequency and amplitude and particles gradation on soil compaction were also investigated. The results show that the high frequency resonance compaction method is most suitable for the deep sandy ground improvement. During the construction process of resonance compaction, soil porosities decrease dramatically and the surface displacement is obvious. The mechanical characters of soil around the vibrio-rod are also changed greatly. The vibration frequency, amplitude of a vibrio-rod and the grain composition of soil can affect the dense degree of the ground. It can obtain the densest degree under the resonant vibration frequency and appropriate amplitude according to the characteristics of soil in a construction project.