The energy storage industry in China is in a period of transition from the policy to the implementation plan. Under the government various guiding policies, many provinces according to their regional characteristics have issued relevant policies in battery cascade utilization, electrical auxiliary service, and new energy generation. These have accelerated the pace of energy storage to commercialization to a large extent. This paper summaries the energy storage policies in terms of battery cascade utilization, new energy generation, electrical auxiliary service and electricity price reform by the government and the provinces. It analyses the policy points and profit model of energy storage technology in the application field, municipal action plans, and enterprise demonstration projects. It also gives the corresponding suggestions and prospects for the current commercialization process of energy storage. This should provide some valuable reference for increasing the energy storage benefits in the future. This work is supported by National Natural Science Foundation of China (No.?51777197) "Research on the Mechanism and Application of Convergence Effect of Distributed Energy Storage System"; State Grid Corporation of Science and Technology Project "Research on Energy Storage System Modeling and Simulation and Optimal Configuration Technology for New Energy Economic Operation" (No.5278991900ML).