This study focuses on the analysis of Sentinel-1SAR data acquired over the Maduo region in Qinghai, China, spanning the period from 2021 to 2025. A combination of D-InSAR and MT-InSAR techniques was employed to investigate both co-seismic and post-seismic deformation processes. The derived deformation fields facilitate a comprehensive assessment of the spatiotemporal evolution of regional crustal deformation, as well as the characteristics of earthquake fault rupture and slip distribution. The findings reveal that the co-seismic deformation field of the Maduo earthquake exhibits an elongated elliptical shape, with the fault generally trending in the SEE-NWW direction. The maximum fault offset in Line of Sight (LOS) is approximately 1.8 m. The predominant fault motion associated with the Maduo earthquake is primarily horizontal, with the main fault identified as a left-lateral strike-slip fault. The co-seismic rupture is inferred to be shallow. The post-seismic afterslip deformation exhibits a direction consistent with the co-seismic deformation, with LOS displacement reaching up to 50 mm. This indicates that the post-seismic deformation following the Maduo earthquake is primarily governed by shallow afterslip. The long-term post-seismic deformation is relatively minor, suggesting that viscoelastic relaxation plays a limited role.