The invention discloses an aerospace test data transaction method, and belongs to the technical field of aerospace test data transaction. According to the method, all related participants are added into a private block chain network through authorization to form a benefit association alliance and jointly maintain block chain operation, so that the legitimate compliance of each participant in a transaction system is ensured, the mutual trust among the participants is increased, an open cooperation environment is provided, and the benign circulation of aerospace industry resources is realized; the full-life-cycle processes of data product generation, data product right confirmation, data block evidence storage, data product transaction, transaction tracing and the like are covered, and a block chain technology is adopted, so that data credibility, data security and transaction traceability are guaranteed; and the problems of value proof, data security, network transaction trust and the like of aerospace test data are solved, the benefits of two transaction parties are guaranteed, and the application range of aerospace industry resources is effectively expanded.