Abstract:The fine crustal structure and deep-shallow tectonic features in Shanxi reservoir area are explored using deep seismic reflection. The results show that the crust in this area has obvious zoning features in the vertical direction and block structures by faults in the horizontal direction. In the studied area, there is a Shuangxi-Jiaoxiyang fault, which strikes to the northwest and extends about 20 km to the mid-lower crust. It is the main controlling fault in this area, affecting the developing of lower faults in nearby regions, and is the main seismogenic structure of earthquakes in this area.