Abstract: Using the traditional SBAS-InSAR method for surface settlement monitoring requires manual selection of target points for track refining and settlement inversion, but it is difficult to manually select stable target points in mining areas with complex environment, which makes the application of SBAS-InSAR method have many limitations.Therefore, a SBAS-InSAR mining area surface subsidence monitoring method based on multi threshold target extraction is proposed.Based on the traditional SBAS-InSAR technology, the deviation threshold parameters, regional window threshold parameters and coherence threshold parameters are set to extract more stable target points on the ground.This method and the traditional SBAS-InSAR method are applied to practical cases to obtain the monitoring results of surface subsidence in the study area for time series analysis and comparative verification.The results show that there are three surface subsidence areas in the mining area, and the location of the surface subsidence area is consistent with the mining working area of the coal mine.The maximum annual average settlement rate is -156 mm/a and the maximum settlement is -376 mm.The absolute average difference between the two methods is no more than 12 mm, which shows that the SBAS method of multi-threshold target extraction can effectively overcome the limitations of the traditional SBAS-InSAR, and ensure high accuracy, which has more advantages in the monitoring of surface subsidence in the mining area.