By considering the seasonal regulation characteristics of hybrid pumped storage power stations, a long-and short-term nested scheduling model for hydro-wind-photovoltaic-storage complementary systems was established with the objective of maximizing power generation benefits. In view of the high-dimensional features in solving the model, the dynamic programming successive approximation algorithm was improved by introducing the pumping-generation conversion model of hybrid pumped storage power stations, and the impact of hybrid pumped storage power stations on the operational benefits of the hydro-wind-photovoltaic-storage complementary system was quantitatively analyzed. Case study results indicate that for hybrid pumped storage power stations built relying on hydropower stations with seasonal or higher-level regulation capabilities, a seasonal regulation scheduling scheme of hybrid pumped storage is recommended. Compared with the scheme without hybrid pumped storage, this scheme can effectively reduce the curtailment of renewable energy (99.37%) and increase the power generation benefits of the system (4.34%). By pumping water from the downstream reservoir to the upstream reservoir in advance, additional flood control storage capacity can be provided for the downstream reservoir, reducing the water curtailment of cascade reservoirs (93.35%). Compared with the daily regulation scheme of hybrid pumped storage, this scheme can improve the power generation in dry periods and increase the comprehensive energy conversion efficiency of the system (6.88%).