Abstract: The deformation monitoring of SBAS-InSAR with long time series can reduce the influence of errors, improve the monitoring accuracy, and effectively identify the hidden danger of geological disasters.The programming data of L-band elevated orbit ALOS-2 in the main urban area of Lanzhou from September 2019 to April 2020 were obtained in this study. The landslide of Lanzhou Pulantai Co., Ltd. was effectively identified based on the small baseline set (SBAS-InSAR) technology by using the integrated geological disaster monitoring system of "integration of Air-Space-Ground".Through on-site verification, the macroscopic deformation signs of the landslide are obvious, and the comparison and analysis with the sentinel-1A orbit rising data processing of the C-band during the same period show that the Deformation monitoring of SBAS-InSAR based on the L-band plays a very good role in the early identification of typical landslides in Lanzhou City, and can be popularized and applied in the early identification of regional landslides.