Due to the long-term mineral exploitation in Bangtang area of Tanjiashan Coal Mine in Hunan Province, a large number of groundwater was strongly pumped out, which led to the formation of large-scale mined-out areas, soil caves and karst collapse. The reservoir in the area was seriously leaked, and some channels were deformed and multiple cracks occurred, leading to the formation of depressions. In this paper, through the study on the current situation of water resources destruction in the region, the corresponding treatment schemes are proposed for the damaged channels, reservoirs and area of subsidence in the study area. Channel remediation projects, reservoir remediation projects and wetland landscape ecological restoration projects are carried out to repair the damaged areas. On this basis, the original waste mining areas are transformed into wetland parks to maximize the restoration of the basic water resources environment in the study area.