Abstract: Dynamic shear modulus ratio and damping ratio are key dynamic characteristic parameters in the analysis of soil seismic response and have a decisive influence on the calculation results of soil seismic response. To reveal the variation patterns and obtain applicable soil dynamic characteristic parameters, this study uses the hyperbolic model fitting results to statistically derive the average dynamic shear modulus ratio and damping ratio of silty clay and sand in the Sanhe area at different burial depths. The relationships between dynamic shear modulus ratio, damping ratio and shear strain for silty clay and sand at different burial depths in the Sanhe area are summarized, and the results are validated through seismic response analysis of an actual site. The results show that: (1) Under the same shear strain, the dynamic shear modulus ratio of silty clay basically shows an increasing trend with the increase of burial depth, and the dynamic shear modulus ratio of sandy soil increases with the increase of burial depth, and the damping ratio of sandy soil gradually decreases with the increase of burial depth. (2) The statistical values of soil dynamic parameters are all within the upper and lower limits of Sun Rui's statistical values, but there are differences compared with Yuan Xiaoming's recommended values and Tianjin's values, reflecting the regional differences of unearthed dynamic characteristics. (3) The difference between the peak acceleration and characteristic period obtained by analyzing the seismic response of soil layer by using the measured values of borehole and the statistical values in this paper is small, which shows that the statistical values in this paper have good adaptability to the actual engineering situation in Sanhe area. The research results can provide parameter basis for site seismic response analysis and engineering seismic design in the Sanhe area, and also enrich the understanding of soil dynamic parameters of typical soil types in different regions.