Landslide disaster is characterized by strong abruptness and high concealment. The traditional investigation methods cannot meet the requirements of finding out the hidden dangers of geological disasters under the new situation. With the development of the accuracy and quality of radar observation data, Interferometric Synthetic Aperture Radar (InSAR) has become an effective means to monitor surface deformation. In this study, the InSAR technology was used to identify the potential landslide hazards in loess gully hill area of Xiji county, Ningxia, and the deformation results from December 25, 2019 to January 18, 2020 were obtained. Combined with the visual interpretation of optical remote sensing images, the potential landslide hazards are comprehensively identified by remote sensing, and a total of 8 hidden danger points are identified. After field verification, it is consistent with the actual situation. The research results showed that InSAR technology has good applicability in this area, which can provide data reference for local disaster prevention and reduction actions, and provide method reference for early identification of landslide hazards in loess hilly area.