Abstract: To solve the problems about the scalability of blockchain storage capacity, storage structure, etc, a structured data management method based on scalable blockchain storage was presented. Based on node dynamic net and the DHT protocol, only part of the data was needed to be stored in every peer to realize the data management. The data signature and timing verification were used to ensure the security of data management, and structured data was stored in the local database to extend the business data management. Test results show that, this method can achieve structured data management based on scalable blockchain storage, make the best of the network resources, reduce the storage pressure of each peer, improve the efficiency of data storage, and promote the development of block chain application in the foreseeable future.