Abstract: This paper develops a carbon emission flow calculation strategy for distribution networks based on blockchain technology based on the advantages of the consensus mechanism and decentralized features of blockchain technique, integrating the relevant features of carbon emission and active power of generating units. In this paper, the high-voltage substation nodes are used as the main chain, and the carbon flow tracking calculation is carried out for the low-voltage substations, and the tamperability of the node information is ensured by the hash-anchoring method. The master chain adopts EA-DPoS (Evaluation and Agent-DPoS) algorithm, and the slave chain adopts the improved PBFT algorithm, and introduces a comprehensive evaluation and reward/punishment mechanism to complete the consensus. Further, based on the carbon emission intensity analysis of the generating units, the distribution network carbon flow is calculated to achieve carbon traceability. The method proposed in this paper ensures the accuracy of carbon traceability results and the efficiency of information transfer, while enhancing the transparency of the traceability process, aiming to provide a new strategy for the green transition of the power system. Finally, the effectiveness of the proposed method is verified by simulation example.