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Aiming at the problems of complex business entities, long information flow, low data utilization and low regulatory coverage in rice supply chain, a information supervision model of rice supply chain driven by blockchain was built and implemented systematically. Firstly, the information flow characteristics of rice supply chain were analyzed, and the main body and key information of each business link in the supply chain were sorted out and refined. On this basis, the supervision model of rice supply chain information driven by blockchain was constructed, the hierarchical encryption storage mode of private data and the customized business logic supervision intelligent contract were designed. Finally, based on the Hyperledger Fabric open source framework, the rice supply chain information supervision prototype system was constructed and implemented. In addition, taking a grain and oil enterprise in Changde City of Hunan Province as an example, the application case analysis was carried out. The results showed that the rice supply chain information supervision model and prototype system constructed can solve the problems of rice supply chain data privacy encryption, secure storage and authority management, realize supply chain information interconnection and effective supervision, which can provide a way for grain and oil quality safety supervision feasible and practical application solutions.