As a decentralized distributed accounting model,blockchain can implement peer-to-peer transactions that require no trust or decentralization between nodes through data encryption,timestamp and smart contract. The rational use of the relevant characteristics of blockchain can provide effective technical support for market-based transactions of distributed generation.First of all,based on the basic concepts of blockchain, the contrast relationship between blockchain and market-based transaction of distributed generation is analyzed.The differences and similarities between blockchain in less-centralized management and decentralized management are analyzed in the aspects of key links of market-based transaction of distributed generation, such as market access, transaction mode, member game, security check, congestion management and transaction settlement. Finally, the urgent problems to be solved in the application of blockchain in market-based transaction of distributed generation are analyzed, and the future research directions are put forward.