Landslides caused by open-pit mining are one of the most dangerous geological hazards in China. Displacement of landslides are different from the deformation of ground sub- sidence due to existing horizontal deformation and vertical deformation at the same time. In this paper, we extend the multi-aperture InSAR method to monitor large-scale horizontal de- formation of landslides. And then, we integrate the multiple-aperture InSAR and traditional differential SAR interferometry (D-InSAR) to reveal deformation field distribution of landslides caused by open-pit mining. The results demonstrated that the proposed procedure is effective to monitor large-scale horizontal deformation and vertical deformation of landslides, especially for the north-south direction landslides.