Abstract: Photovoltaic as a green and low-carbon clean energy, adapt to the current national development, but due to the instability of photovoltaic power generation, the corresponding technology is still in the exploration stage. Taking Huangzangsi Water Conservancy Project as an example, on the basis of describing the project implementation background, combined with the conditions of improving the efficiency of photovoltaic power station, reducing the cost and ensuring the safety and stability of the system, this paper conducts a comparative study on the selection of main equipment of photovoltaic power station, providing basic research results for the site selection, construction and economic cost analysis of Huangzangsi photovoltaic power station. It can provide some reference for traditional hydropower station to explore new water-light complementary model.