CCHP system was the main direction and form of the future development of distributed energy. The multi-objective optimization model of CCHP system with hybrid energy storage was established, considering the initial investment cost and maintenance cost of the equipment, the impact of initial capacity and total capacity allocation of hybrid energy storage on the energy, economy and environmental evaluation indexes of the system under operation strategies of "Setting heat with electricity" and "Setting electricity with heat". The optimal allocation of energy storage capacity and system operation strategy were obtained and compared with those without energy storage. Examples show that reasonable allocation of energy storage capacity and selection of operation strategy were helpful to improve energy utilization, reduce carbon dioxide emissions and operation costs, and provide a theoretical and technical reference for the planning and operation of CCHP system.