Abstract: In order to solve the problem of seasonal power imbalance of regional integrated energy system under the background of high proportion renewable energy, a hybrid energy sharing station considering seasonal hydrogen storage is proposed, and a multi-microgrid energy system with hybrid energy sharing station is constructed. Subsequently, in order to highlight the role of energy sharing stations in seasonal power complementarity, a bi-level mixed integer programming is proposed with the minimum operation cost of the alliance microgrid system as the upper optimization objective and the minimum mean square deviation of the net load in the system as the lower optimization objective, and the solution process of the model is explained. Since the energy sharing station is built by the alliance microgrid system itself, there is still a cooperative relationship between the microgrids. Therefore, a Nash bargaining method based on the contribution of interactive value is proposed to allocate the cost of energy sharing station and the extra profit of the alliance. The results show that the model can effectively reduce the operating cost of each microgrid and the mean square deviation of load in microgrid, which provides reference for solving seasonal imbalance of renewable energy in regional integrated energy system.