With the advancement of electric power system reform, large-scale small and medium-sized users have poured into the retail market, and transactions with electricity retailers will be more frequent, which put forward a severe test for the existing centralized mode. Blockchain technology possesses the characteristics of decentralization, openness and transparency, safety and credibility. It has a natural fit with the business characteristics of decentralized and non-centralized decision- making requirements of the electricity retail market, which has more application advantages than traditional centralized systems. So, this paper proposes an electricity listing transaction mechanism based on the blockchain smart contract and designs the process and model of electricity listing transactions. Then, based on the Hyperledger Fabric platform, the smart contract for electricity listing transactions is designed, and a case is implemented to verify the effectiveness of the proposed listing transaction mechanism.