Abstract: Taking the traceability platform of agricultural products as the research object, the blockchain technology was applied to the traceability platform of agricultural products, the trusted traceability platform system of agricultural products based on blockchain was constructed, and the consistency protocol of blockchain PBFT（Practical byzantine fault tolerance） algorithm was improved, which realized the sharing and non tampering of traceability data of agricultural products, and ensured the authenticity and timeliness of traceability information. In order to verify the function of the traceability trusted platform, a series of system tests were carried out to verify that the traceability trusted platform of agricultural products meets the functional requirements. The results showed that the system adopted blockchain technology to solve the problems existing in the traditional agricultural product traceability platform, such as unreliable traceability information, poor system security, data leakage, unsafe transaction and so on, so as to make consumers trust the traceability information more and feel more at ease.

Key words: food safety, traceability information, blockchain, PBFT algorithm