Abstract:The centralized traditional energy trading mode has the problems of inflexibility, non-transparency and non-supervision. Furthermore, the new power system puts forward new requirements for the marketization of power trading and power pricing mechanism among various entities of various power grids. To solve these problems, and to meet the new requirements, a blockchain-based power trading model and a game-based pricing method were proposed. The trading system has the advantages of distribution, decentralization, immutability and cryptographic security, are effective ways to solve problems. Firstly, a blockchain-based power trading model is constructed to coordinate the production and consumption behavior among power generation, supply and use, so as to form a unified market mechanism. Secondly, a game-based multiple time scale bidding mechanism for power trading is proposed, and the Ant Colony Optimization (ACO) algorithm is used to obtain the best bidding price per hour. Finally, the trading model and game pricing method are verified by simulation, and the returns of each trading participant are optimized under the conditions of incentive policies. The results show that the trading model and pricing method can effectively balance the benefits of participants involved in the market when new energy is considered . By smart contracts of blockchain, the trading system realizes the intelligence, transparency and traceability of the power trading process, and achieves win-win and coordinated development for all participants.