Aiming at the current problems of low utilization efficiency and low income caused by high energy storage cost and lack of trading platform, a non-cooperative game trading model based on blockchain technology is designed. The concept of shared energy storage is introduced by taking microgrids as nodes, and the nodes identity verification is carried out by using digital signature technology to effectively improve the security of transaction. Based on the self-driven and self-executing characteristics of smart contract, a shared energy storage trading mechanism is established. Through the establishment of non-cooperative game model, the benefits of each node can be maximized, energy storage benefits can be improved, the enthusiasm of node users to participate in transactions can be improved, and the industrial structure can be further optimized. Example analysis shows that the non-cooperative game trading model of shared energy storage based on blockchain proposed in this paper can effectively realize energy storage participation in market transactions, improve energy storage utilization efficiency, increase energy storage project income sources, and provide effective technical and theoretical support for the further development of energy storage industry.