Abstract:This paper selects the continuous seismic background noise of seismic survey line from Meixian to Fufeng in the Weihe basin. Based on the HVSR method, the HVSR curves of each station are obtained. The structural characteristics of the Quaternary sedimentary layer near the surface below the survey profile are obtained through the conversion between frequency and depth. The results show that the thickness of the Quaternary sedimentary layer in the basin is in a U-shaped distribution, gradually becoming thicker from both sides of the basin to the middle of the basin. The depth on both sides is 100 to 400 meters, and middle of the basin is about 400-600 meters. The depth profile of the sedimentary layer shows intermittent and jumping characteristics at 25 km and 33 km from the starting point of the survey line, which is in good agreement with the Qishan-Mazhao fault and Fufeng-Qianxian fault in spatial location.