Abstract: The Lintong-Changan fault is located in loess area,which is researched usually with surface or remote geologic survey methods due to poor stability of loess.Because of influence of landslide and wet subsidence of loess plateau,the structural characters of fault profile is limited by depth and poor reliability.Especially the struc-tural property at deep depth is only inferred.The seismic survey is considered as one of most effective survey methods for detecting deep structures.The boundaries among Lintong-Changan fault,Zhouzhi-Huxian depression and Lishan Salient are identified,and the structural characters of Lintong-Changan fault profile are determined with seismic survey and regional structural study.