Abstract: Affected by the landform of plateau accumulation dune in western mining area,conventional timeseries interferometric synthetic aperture radar (InSAR) technology is difficult to obtain a sufficient number of monitoring points,and cannot completely extract the surface deformation information of the mining area.Taking Shilawusu Coal Mine in Inner Mongolia in western mining area as an example,based on 52 Sentinal1A image data covering the study area,a timeseries surface deformation monitoring method based on distributed target InSAR (DSInSAR) for plateau accumulation dune landform in western mining area is used in this paper,the temporal and spatial distribution information of surface deformation caused by mining in the study area from 2016 to 2018 is obtained by this method.The study results show that during the monitoring period,there are two obvious subsidence basins on the surface of the mining area,and the vertical maximum cumulative subsidence in the basin exceeds 400 mm.Compared with the conventional time series InSAR method,this method can obtain more monitoring points with uniform spatial distribution in the study area,so as to extract the surface deformation information of the study area more accurately.Compared with the level measured data,the correlation coefficient between them is 0.97,the absolute error between them is small and the overall error distribution is reasonable,indicating that this method has high reliability and can be well applied to the surface deformation monitoring during inadequate mining under the landform of plateau accumulation dune in western mining area.