This paper conducted numerical analysis for the dynamic characteristics of filled foundation by strong compaction, based on the elastic-plastic large deformation theory and by using the ANSYS / LS-DYNA simulation software. It ultimately got the change curve of dynamic stress, vertical displacement and acceleration in time and space in soil by strong compaction,and summarized the distribution characteristics and variation rule. The numerical simulation results were coincided with the field test data by strong compaction. Which can provide a reliable analysis method for further study of strong compaction theory and also a reference for the design and implementation of strong compaction and has a certain guide significance.