Abstract: Using SBAS-InSAR based on StaMPS and taking Antaibao Open-pit Coal Mine as research area, this paper carries out time series interferometry processing on 33 sentinel ascending and descending images, extracts ground deformation information of open pit coal mine for 7 months. According to SAR satellite imaging geometry, slant-range deformation information is decomposed, and cumulative deformation of open-pit coal mine in two-dimensional direction during data collection period is obtained. Deformation rate of open-pit coal mine is -258 mm/a. A large subsidence center is found in dump, and cumulative subsidence is 134 mm; large gradient deformation in decorrelation area is calculated by offset tracking technique. The combination of two techniques can better monitor deformation of open-pit coal mine at different gradients.