Abstract: Since the exploration of the construction of "PV + coal mining subsidence area" in China,many places have used green energy innovative applications to drive the economic transformation of coal mining subsidence areas. The research content is mostly focused on the specific project design practices,foundation stability assessment,and comprehensive benefits evaluation of the "PV + coal mining subsidence area" mode. Some research progress has been made,but there are currently some objective problems restricting the promotion and application of this mode. Based on the literature research method,this paper analyzes the characteristics and laws of the development of " PV + coal mining subsidence area" mode in China,summarizes its development process,explores the objective problems existing in its promotion process and puts forward corresponding solutions. The research results show that:1) The application of "PV + coal mining subsidence area" mode in China is mainly distributed in areas with high-intensity coal mining foundation. 2) In this mode,the selection and design of PV brackets need to consider many influencing factors such as subsidence stability,stratum conditions,flood level and development mode,and it is necessary to conduct a comprehensive benefit evaluation of the project,including economic benefits,ecological benefits,and social benefits. 3) There are some problems in this mode,such as the nature of the land in the coal mining subsidence area has changed,but the approval for conversion has not been handled in time,the lagging construction of the power grid affects the consumption channel,the convenience and environmental friendliness of the application of fixed PV power station on water need to be improved. 4) During the project promotion process,it is necessary to ensure that the land ownership of the coal mining subsidence area used by the PV power station is legal and compliant.Innovative on-site consumption mode. It is recommended to use remote sensing and big data methods to monitor the water conditions,and to provide effective guarantees for the stable operation of PV power station on water in coal mining subsidence areas through efficient and intelligent operation and maintenance management.5) It is recommended to optimize government financial expenditures and establish an evaluation mechanism for the efficiency of governance fund utilization of coal mining subsidence areas during the early stages of project construction. Constantly broaden the funding channels and improve the management and supervision mechanism,so as to enhance the role of financial subsidies and project investment in ecological restoration of coal mining subsidence areas.