Abstract: How to distinguish the sliding zone from a loess landslip relied on the technician’s experience in-site.4 typical loess landslides located in Jingyang County along Jinghe River,named Dongfeng landslip,Shutangwang landslip,Xiuchidu landslip and Taiping landslip were studied through in-situ measurement and sample tests to identify the sliding zone.It was shown that the physical property,electric resistivily and microstructure of soil in the slide area were different from those in the slope,and could be used to determine the slip zone,while the mineral ingredient and chemical composition could not be used generally to identify the slip zone.