Centralised administration, lack of transparency, unreliable data, and the simple creation of information islands are only some of the issues plaguing the conventional traceability system. This study creates a blockchain-based traceability system for storing and querying product information in the agricultural supply chain to address the aforementioned issues. By using blockchain technology's decentralised, tamper-proof, and traceable properties, the transparency and reliability of traceability data were significantly boosted. To ease the burden on the chain and allow for more effective information queries, a hybrid database-blockchain storage structure is built. Safe and secure private data exchange on the blockchain network is suggested using a combination of blockchain technology and cryptography. We also create a reputation-based smart contract in order to encourage nodes in the network to provide traceability information. In addition, we provide performance analysis and real-world implementation; the results demonstrate that our system enhances query efficiency and privacy, ensures the veracity and accuracy of data in the management of supply chains, and conforms to the needs of real-world applications