This paper presents the main research accomplishments that relate to the differences in the maximum dynamic shear modulus between laboratory and field test soils, the relationship expressions of the dynamic shear modulus and damping ratio versus shear strain and its local experiences, the effects of consolidation ratios on the maximum dynamic shear modulus, results from dynamic Poisson ratio studies, and experimental errors and their effects on seismic motion results. The factors affecting the maximum dynamic shear modulus difference in field and laboratory tests are mainly the soil specimen stress state, the consolidation ratio, the size effect, the degree of disturbance, the time effect, the secondary consolidation effect, and the soil mass inhomogeneity and anisotropy. The maximum dynamic shear modulus obtained from the anisotropic consolidation test method that considers the real consolidation ratio is closer to that of the in-situ wave velocity test method. Experimental results of the soil's dynamic shear modulus and damping ratio show uneven geographical distribution, rough soils classification, distant connection with the physicomechanical indices of soils, disunity among the experimental apparatus, the experimental method, and the data processing model, and few studies on experimental errors. Studies on the dynamic Poisson ratio of the soils are comparatively weak. We suggest a number of studies be carried out that concentrate on the dynamic Poisson ratio, a unified mathematical model of the dynamic parameters of the resonant column and cyclic triaxial test soils, the relationship between soil dynamic parameters under isotropic and anisotropic consolidation conditions, the relationship between soil dynamic parameters and the conventional physicomechanical index, and the experimental errors of soil dynamic parameters.