Abstract: Based on ERS1/2 images，and in view of the No.22 Mining Area of Peicheng Mine，DORIS were chosen for D-InSAR (Differential Interferometric Synthetic Aperture Radar) process to monitor the mining subsidence in Er'er mining area of Peicheng by the Doris software in this paper，and the subsidence values were obtained.After compared with the surface observation data，the relationship between the surface observation data and the results obtained by D-InSAR technique were established.According to the formulations，the subsidence values obtained by D-InSAR technique were modified，the land subsidence values closed with the surface observation data were calculated，and this proves that using D-InSAR technique to monitor the mining subsidence are very reliable.

Key words: D-InSAR, Subsidence monitor, Doris, Peicheng mining area