Abstract: Levees are constructed to protect coastal cities from typhoon, flood and sea tide. Since the stability of the levees is important during the extreme weather, it is necessary to monitor its deformation regularly. Repeat\|track space\|borne SAR images are useful for environment monitoring, especially ground deformation monitoring. Persistent scatterer technique is carried out to monitor the deformation of the levees. To make the subsidence map, we use 24 scenes recorded from Envisat satellite. The experimental results show that the levees around Pudong airport and Lingang town which were built on the land reclamation suffered serious deformation.