［Purposes ］ This paper aims to study the temporal and spatial evolution of surface subsidence in the Baisha Reservoir coal mining area in Henan Province.［Methods］ This paper selected the European Space Agency Sentinel -1A image data from December 7，2015 to March 7，2017，and the multi -temporal interferometric synthetic aperture radar （MT-InSAR）was used to carry out deformation monitoring research on 20 remote sensing images of the Sentinel -1A orbiting satellite.Specifically，two sets of time -series deformation results in this region were obtained by using persistent scatterer InSAR （PS-InSAR） and small baseline subsets InSAR （SBAS -InSAR） techniques in MT -InSAR technology.A cumulative subsidence point change analysis，a subsidence basin profile analysis，and a time -series analysis of subsidence feature points were carried out.At the same time，the time -series deformation results were compared with the measured leveling results for accuracy verification.［Findings］ There are three typical subsidence basins in the study area，and the maximum cumulative subsidence amount is 141 mm.The temporal and spatial distribution characteristics of the two groups of results maintain a good consistency.The study area is dominated by linear subsidence.The root mean square errors of the subsidence results obtained by using PS -InSAR and SBAS -InSAR technologies from the measured data of the leveling survey were ± 8 mm and ± 6 mm，respectively，accounting for 5.7% and 4.3% of the maximum cumulative subsidence amount in the mining area.［Conclusions ］ Through the cross -validation of the two sets of experimental results，the correlation coefficient is as high as 0.825 8，which confirms the feasibility of MT -InSAR technology in monitoring the deformation of this mining area，and it can provide reference for safe mining and environmental protection in the local mining area.