Abstract: Abstract: In the context of the "dual carbon" goal, photovoltaic power generation plays an important role. The opencast dump site provides a new scenario for photovoltaic power generation. However, the construction of photovoltaic power stations in high backfill soil dump sites requires overcoming settlement and deformation issues, and the selection of photovoltaic supports and foundations has become a key and difficult point in power station construction. To address the design issues of photovoltaic supports and foundations for high backfill soil dump sites, this article is based on a photovoltaic power generation project in a dump site in Shanxi, analyzing the impact of settlement deformation on photovoltaic supports and foundations, and in combination with requirements in code and site backfill soil conditions, conducting research and analysis on the selection and economy of photovoltaic supports and foundations, providing a solution for the design of photovoltaic supports and foundations for high backfill soil dump sites.