In order to solve the problems of insufficient flexible resources and poor regulation characteristics of power system frequency regulation, a load frequency coordination optimization control method based on distributed model predictive control is proposed for the interconnected power system with the wide?area access of pumped storage and battery energy storage. Firstly, according to the frequency response characteristics of the main components in the interconnected power system, the state space model of the frequency response of the interconnected power system is established. Then, taking into account the constraints on the system, the optimal control targets are determined, and the controllers are designed in each area, respectively. Finally, the feasibility and effectiveness of the proposed load frequency coordinated optimization control method are verified in simulation. The results show that the method not only improves the frequency response characteristics of the wide?area hybrid energy storage interconnected power system, but also enables different energy storage forms to respond reasonably when the system frequency changes.