With the steady development of electricity market reform and major breakthroughs in energy storage technology, how to improve the market mechanism and trading model to better adapt to the characteristics of energy storage and encourage energy storage to better play a positive role in the operation of the power system deserves in-depth discussion. This paper proposes a trading model for energy storage in energy market considering charge and discharge efficiency control. The model treats the charge and discharge efficiency as a decision variable, and optimizes the value of efficiency. The simulation analysis verifies the effectiveness of the proposed model. The proposed model provides a reference for the improvement of existing trading models.