With the entry of large-scale commercial power users into the market, the electricity trading retail market faces a surge in the number of users, agency relationships, and retail-side settlement. All these pose huge challenges to the support capability of the retail side business of power transactions, the system’s ability to process concurrently with big data, and the compliance and electronization of business processes. block chain technology has technical characteristics such as anti-tampering and node sharing, which can well solve the difficulties and pain points in the process of electricity retail transactions. The block chain technology is integrated into the research and application of electricity market transactions, and the technology can not be tampered with., high reliability and advantages, and then properly solve the current problems of privacy protection, transaction security and low transaction efficiency, while reducing transmission costs.