Abstract:In this paper, we use ambient noise tomography to study the Shanxi regional crustal velocity structure and deep tectonics.The data includes 7 months (2014 January to 2014 July) three-component continuous data recorded at 44 seismic stations of Shanxi province digital seismic networks and its surrounding . The S-wave velocity structure of the crust is inverted from Rayleigh wave dispersion maps. The S-wave velocity maps show clear lateral variations that correlate well with major geological structures and tectonic units in the study regions: in the upper crust, S-wave velocities of the Shanxi fault depression zone are relatively low at shallow depth, while the uplifts on sides of Shanxi fault depression zone show high velocity. In the mid-lower crust, the latitude ~38.5°N divides the region into a northern part with a low velocity anomaly and a southern part with a high velocity anomaly. Datong basin shows low velocity in the crust,possibly related to the wide distribution of volcanoes.