The digital ticket trading platform based on blockchain technology includes the ticket exchange digital bill management subsystem，the commercial bank digital bill registration and transaction subsystem and the enterprise digital bill business subsystem，covering the roles of ticket exchange，commercial banks and enterprises. While realizing billing，endorsement transfer，discounting，re-discounting，cash at maturity and other main business functions，it also introduces a see-through mechanism to achieve real-time supervision of ticket exchange data. This report shares the application exploration and supervision practice of blockchain technology in the field of digital bills. Starting from the technical characteristics of blockchain，combined with the bill business，it explores the realization of the supervisory function based on blockchain technology.