Abstract: Recently D-InSAR technique has been widely adopted to monitor land subsidence deformation caused by earthquake、withdrawal of water and minerals. But monitoring subsidence caused by underground coal mining is more difficult because of its small spatial extent and slow velocity. D-InSAR is liable to be contaminated by atmosphere delay, temporal decorrelation and baseline errors. Luan-Mine, Shanxi province has thousands of valuable leveling data, smooth topography and severe subsidence, it becomes a nice place to test and analyze D-InSAR technique. The result demonstrates that D-InSAR can detect subsidence within 2 months and point out its distribution and scope. The final interest of research is to establish a robust, cost efficient mine subsidence monitoring system by using D-InSAR technique.