Abstract: The thickness of the Quaternary system is relatively thin in the southern mountainous area of Weifang City, while the northern area is an alluvial plain. The thickness of the Quaternary system is relatively large, gradually increasing from south to north. In addition, the northern part of Weifang City is a coastal saline water intrusion area, and traditional geophysical methods, especially electrical and electromagnetic methods, have not been effective in carrying out work in this area. This study draws inspiration from the idea of multiple coverage observation systems in seismic exploration, and uses efficient micro motion detection technology with multiple coverage of linear arrays to analyze and study the dispersion characteristics of surface waves in different strata of Weifang City. Based on the differences in dispersion characteristics, the stratigraphic structure is divided. The research results indicate that the frequency dispersion curve in the shallow coverage area of the southern part of Weifang City has a wide range of frequency points, and the overall trend is a rapid increase in the surface low-speed middle deep layer; the frequency point range of the dispersion curve in the thick coverage area of the northern part of Weifang City is relatively narrow, and the overall pattern shows a slow increase in depth, high and low velocity; the dispersion curve of the developed strata in the ancient river channel exhibits irregular jumps or zigzag inflection points, and is generally of the highest deep wave velocity and low middle velocity type.