In this study, we chose the shallow residual soil from a constructional engineering site in Xiamen as our remolded specimen, and used the SDT-10 microcomputer control electro-hydraulic servo dynamic triaxial test system as the main test equipment. Under sine dynamic loading, we tested the dynamic characteristic curves and parameters of the residual soil's dynamic stress-strain, dynamic deformation times (number of loads), and dynamic modulus of elasticity with moisture contents of 10%, 15%, 20%, and 23%. The analysis of the test data indicates that the specimens showed viscoelastic-plastic behavior, and the higher the moisture content of the specimen, the greater the cumulative plastic axis deformation, but the most elastic modulus slowly decreases. The extent of the decrease in the most elastic modulus is not great when the moisture content of specimen increases from 20% to 23%.