Abstract: To ensure the safety of the construction of photovoltaic plant in coal mining subsidence area, it is very necessary to carry out the evaluation of foundation stability and goaf treatment. Taking the photovoltaic project in Datong city of Shanxi province as an example, project profile for the construction of photovoltaic plant in subsidence area was introduced. Based on the theory and practice of coal mining subsidence and coal mines in Datong city, according to the demand for different stages of photovoltaic project, the responding foundation stability evaluation were finally carried out. Some technical measures for goaf treatment were proposed for the construction of photovoltaic plant.