In order to adapt to the new requirements of large-scale photovoltaic output connected to the Wujiang River Basin and jointed dispatching and bundled transmission with cascade hydropower stations, the staged generation strategy of cascaded hydropower stations under the Hydro-PV complementary mode was proposed based on the actual energy storage control mode of the basin, and the reasonable range of energy storage at the beginning of the flood season and the end of the year was determined, so as to draw the Hydro-PV complementary cascade energy storage dispatching diagram to guide the medium and long-term Hydro-PV complementary dispatching. The case verification results show that, compared with the actual power generation of cascade hydropower stations in the basin, the Hydro-PV complementary cascade energy storage dispatching diagram can increase the system power generation by 70 million to 210 million kW·h. The drawing of Hydro-PV complementary cascade energy storage dispatching diagram is simple and reasonable, and the optimal dispatching results are in line with the reality, which can be used for the medium and long-term Hydro-PV complementary optimal dispatching in the Wujiang River Basin.