Abstract: In order to solve the problems of high cost, privacy leakage, and fault risk in traditional centralized power trading, a new solution is proposed, which implements distributed power trading through an energy aggregator, using distributed key generation and smart contract matching technology to improve the security and stability of the system. The experimental results show that the proposed scheme has an average transaction delay of 250 ms, and its matching efficiency is close to 100% when processing 160 transactions, which is superior to other schemes. The results indicate that this method provides a more efficient and reliable solution for distributed power trading.