The invention relates to the technical field of data management platforms, and discloses a blockchain-based data mutual-trust mutual-sharing intercommunication platform, which comprises a blockchain module, a data PaaS platform module, a unified identity system module and a decentralized data exchange module. According to the blockchain-based data mutual-trust mutual-sharing intercommunication platform, based on the blockchain technology, the safety of data is guaranteed, meanwhile, benefit distribution of all parties in the data circulation process is guaranteed, dependence on the data format is reduced, the specification and quality of data opening are guaranteed, and therefore, existing investment is protected to the maximum extent, and the social value of the data is increased; the problems that existing data development and sharing are prone to information leakage, and data rights and interests cannot be effectively tracked and calculated during data circulation can be solved.