Abstract: The border area of Shanxi, Hebei, Shandong and Henan provinces is located in the southeast of North China Craton. The study of the crustal structure of this area can further understand the geological structure evolution characteristics, earthquake mechanism, and seismogenic regularity in the southern Hebei and its adjacent areas. This paper collects the continuous waveform observation data of 84 seismic stations in the border area of Shanxi, Hebei, Shandong and Henan provinces. Through the calculation of the correlation and superposition of the waveforms of stations, the empirical Green's function between each station pair is obtained. And then the Rayleigh wave dispersion curve is extracted by image analysis technology. In this paper, the velocity structures of shear waves at different depths are obtained based on the surface wave direct imaging method. The results show that some velocity anomalies are related to the surface geological tectonic units in the area, and the velocity anomaly shows regional distribution characteristics. Significant velocity difference exists between the basins and the mountains. The velocity variation characteristics of the shallow upper crust structure are closely related to the regional structure such as the thickness of sedimentary layer and the buried depth of crystalline basement, and the irregular velocity anomalies of the middle and lower crust and upper mantle are related to the occurrences of earthquakes.

Key words: Border area of Shanxi, Hebei, Shandong, and Henan provinces, Ambient noise, Rayleigh wave, Group velocity