Abstract: The exploitation of coal resources is moving toward the west China acceleratively, which aggravate the land damage in northwest mining area. Considering the traditional monitoring methods can hardly achieve the goal of overall diagnosis of land damage, Wuhai mining area was taken as study area and a model for measuring the land damage in mining area was proposed. The model mainly combined the functions of land structure damage and function damage. Landsat TM/OLI images, Sentinel-1A SAR images, 3S technology and InSAR technology are used to extract the model's critical parameters such as vegetation damage index, ground deformation index, land cover, etc. The results show that the spatial distribution of land damage is featured by attenuation around the mining working face. 42.36 km² of land has high land damage value between 4.5 and 8.0, accounting for 2.68% of the total area. 544.21 km² of land has moderate land damage value, accounting for 34.43%, while 994.02 km² of land is non-damage area, accounting for 62.89%. The measurement of land damage can refine the design of environmental restoration and provide reference for the land consolidation and restoration of Wuhai mining area.