Abstract: To solve the problem that the surface deformation precision monitored by DInSAR is reduced for a lower resolution of SRTM DEM (resolution of 30 m) than that of radar images, a method combined 3D laser scanning and DInSAR technique is studied to monitor the dynamic subsidence in mining area. In this method, high resolution and high precision DEM are constructed by using 3D laser scanning point cloud data. Then, the low resolution SRTM DEM is used to interpolate the missing data area to obtain the DEM of the whole study area. Finally, it is processed by time-series differential interferometric measurement with high resolution SAR image to get mining surface dynamic subsidence monitoring data. The results show that compared with the existing monitoring results of SRTM DEM, this method reduces the influence of DEM error on the deformation results, and realizes the large-scale, high precision and dynamic mining subsidence monitoring, which has a good application value.