In the monitoring of surface subsidence and natural disasters caused by mining, it is particularly important to obtain the three-dimensional deformation data of the ground. At present, the vertical deformation of the ground is usually obtained using level measurement, and the three-dimensional deformation of the ground is generally obtained using Global Navigation Satellite System (GNSS), etc. However, it is difficult to achieve a larger range or longer period of coverage using these traditional measurement techniques, which requires a lot of financial and material resources, and can only obtain the deformation of multiple points, and cannot obtain the deformation of the whole ground, so that the emerging deformation points can be found in time and the time of disaster warning can be missed.With the continuous launch of synthetic aperture radar (SAR) satellites, synthetic aperture radar interferometry (InSAR) has been developed as never before, but there are still numerous shortcomings. Although the traditional differential synthetic aperture radar interferometry (D-InSAR) and multi-temporal synthetic aperture radar interferometry (MT-InSAR) techniques can acquire the deformation on the whole ground and also greatly reduce the labor and time costs, they can only acquire the one-dimensional deformation components along the radar LOS (line-of-sight direction) direction, and this shortcoming has greatly limited the application of InSAR technology in deformation monitoring.To solve the problem that InSAR cannot obtain the three-dimensional deformation, researchers have proposed the method of obtaining a set of equations consisting of at least three equations using multiple orbits (at least three) of ascending or descending orbits to obtain the three-dimensional deformation components for decades, but there are a large number of regions where the data of three orbits at the same time cannot be obtained, and this defect prevents the method from being widely used.In order to verify the reliability of this method in underground mining and to monitor the surface deformation in the mining area, this paper uses this method to successfully obtain the complete 3D deformation components of a recent coal mine in Shandong Province at a certain time period and compares them with the known level data to verify the reliability of this method and use this method to monitor and analyze the subsidence in the mining area.The results show that the method is more reliable in the mine area, and the monitoring data are more consistent with the level data than the one-dimensional monitoring, so it can be applied to the three-dimensional monitoring of surface deformation in the mine area; the results of the three-dimensional deformation monitoring in the mine area show that the vertical deformation is dominant in the three-dimensional deformation, and the deformation rate is larger during the mining period, and the surface deformation still has a tendency to settle after the mining stops, and slowly tends to be stable after a long time.