Abstract: By using TerraSAR-X data, it carried out the data processing of D-INSAR two-track method with GAMMA software, and got the surface subsidence data of the working face in a mining area. Then the subsidence basin was drawn, compared with the measured data, the research obtained that the trends of mining area D-INSAR monitoring subsidence value curve and level measured subsidence value curve were consistent, then obtained the variation law of their difference value and the distance between the point position and maximum surface subsidence point. It gave the correction formula tentatively, the results met the need of surface deformation monitoring.