Abstract: Saturated soil is a kind of loosed medium filled with water in the pores. Such soil will be deformed nonlinearly when subjected to the dynamic load, hence its constitutive law has its specific features. A dynamic triaxial soil testing system MTS-810 with high precision and high sensitivity is used to conduct a series of modelling tests for assessing the dynamic consolidation effects on soil foundation for the first time. The test conditions are in full accord with the actual soil conditions. The test data including dynamic stress and displacement as well as pore pressure can be collected with the time interval of millisecond. By combining with different test conditions, a lot of test data with high precision were obtained. On such a basis, the variation of all variables with time in process of dynamically consolidation as well as their interralation are comprehensively studied. The result provides a scientific base for dynamic consolidation research. Using the modelling test results, the dynamically constitutive law for dynamic consolidated saturated soil is derived. It is obtained based on the precise dynamic consolidation modelling test. Therefore it can reflect the actual soil state of dynamic consolidation and relevant problems can be solved with the improved model.