Abstract: The construction of photovoltaic equipment in coal mining subsidence area will inevitably lead to the damage of equipment caused by surface deformation. In order to ensure the safety of photovoltaic equipment, it is necessary to control the goaf under the photovoltaic equipment. Through the comparison and analysis of various goaf management methods, it is considered that grouting filling method is an effective method to control goaf. According to the situation of Caojiagou collection station, the project cost is reduced under the condition of ensuring the safe operation of the collection station by reasonable treatment angle and treatment scope.