The shear wave velocity of soil is one of the most widely used parameters of geotechnical engineering investigation and seismic safety evaluation.It is indispensable for the determination of site classification and soil response calculation,and is also indispensable for calculating the predominant period of building site,judging liquefaction of sand foundation,test the result of foundation soil reinforcement treatment and elastic modulus.In this project,when there is no measured shear wave velocity according to the standard penetration value or the depth of soil layer using the statistical relationship for soil layer shear wave velocity,and with a large number of ongoing engineering constructions in the same city,the repetition of shear wave velocity testing not only affects the progress of the project,but also increases the project investment.Therefore,it is reasonable to assume that the empirical relationship between the soil shear wave velocity and the depth of soil,which will accelerate the construction of major projects in the process,has significant social and economic benefits.Since the 1970s,scholars at home and abroad(e.g.,Hardin[Year])that conduct research on the shear wave velocity of statistical relationships believe that the shear wave velocity and the depth of the soil layer have better statistical relationships,which can be mainly divided into three types of the power function,linear function and a polynomial.Kashi is an ancient border city of the western motherland with a history of over two thousand years.Kashi city decided in 2008to carry out the seismic microzonation.The working range was 105km2,in which 105drill holes were laid,and then more than 1600test points of the shear wave velocity were obtained.This work laid the foundation for the study on empirical relationship between the soil shear wave velocity and soil depths in Kashgar city.In this paper,based on statistical studies of the empirical relationships between the soil shear wave velocity and soil depth,according to the unit division of Kashi city landform,we described the formation lithology of different geomorphic units,collected shear wave velocity data of the seismic microzonation in Kashi city and nearby seismic safety evaluation,analyzed the shear wave velocity data.Then we used three statistics regression analysis method most commonly used today to give respectively the empirical relationship between shear wave velocity and soil depths of conventional soils such as silt,silty clay,silt,sand and gravel in two geomorphic units of alluvial plains in the south of the Ake Tagg mountain area(Ⅰarea)and alluvial plain of the Tuman River- Kyzyl River(Ⅱarea).Through statistical study we find that the fitting relationship ofⅡ-2＇s has a higher precision,and in fitting relationships,the power function model is primary,the polynomial is less important,and there is no linear statistical relationship.The analysis shows that the statistical formula of shear wave velocity and the depth of the recommendation is reliable,although there is no wave velocity test site for reference,providing the soil background information and analysis basis for the city of Kashi to implement earthquake disaster mitigation planning and soil seismic response analysis.