Abstract: This paper is the result of ground matrix survey.Objective At present, the investigation of black land surface matrix is widely carried out in Northeast China, and various geophysical methods are important means to investigate the vertical structure characteristics of black soil surface matrix. In this paper, the typical surface matrix area in the Molidawa Daur Autonomous Banner ( Moqi for short ) of the Songnen Plain was selected to carry out micro-tremor exploration profile measurement and array measurement,so as to verify, the application effect of micro-tremor exploration method in the vertical structure investigation of black land surface matrix.Methods In this paper, the microtremor exploration technology combining artificial source and natural source surface wave is used. By extracting the surface wave dispersion curve of each measuring point for inversion analysis, the wave velocity and vertical spatial structure characteristics of different matrices are inferred by using the apparent shear wave velocity change, and the vertical structure characteristics of the surface matrix layer ( 0 ~ 40 m ) are obtained in combination with drilling verification.Results Based on the investigation of the micro-motion profile in the typical area of Moqi Banner, combined with borehole correction and regional physical parameters, the two-dimensional apparent shear wave velocity profile and three-dimensional array model of the study area were drawn. The spatial structure, soil type, soil matrix thickness and distribution characteristics of the surface matrix layer of 0 ~ 40m in these areas were explored, and the geological characteristics and apparent shear wave velocity range of the surface matrix layer in the study area were obtained. Conclusions Through this study, it is found that the combined exploration effect of artificial source and natural source surface wave is remarkable.Effectively combining the advantages of both can improve the exploration depth and shallow resolution, enhance the exploration ability of a single method, and is an effective geophysical method suitable for surface matrix layer investigation.It can provide scientific and effective data support for the vertical structure survey of surface matrix survey.