This paper begins with a discussion of the trust issues that agricultural supply chain finance faces. It then examines the constraints of using blockchain technology to enhance trust in agricultural supply chain finance in accordance with the technological and institutional logic of combining blockchain with supply chains. This study then proposes the creation of an agricultural “blockchain + supply chain” information service platform and a financing trust mechanism that can effectively ensure the authenticity of the initial information input on the blockchain, consistency between onchain transaction data and off-chain physical transactions, the controllability of risks in the set up and execution of smart contracts, and the removal of information constraints, resource allocation constraints, and institutional constraints in the agricultural supply chain financing. This aims to improve the efficiency of financing in agricultural supply chains and contribute to the industrial development of rural areas and rural revitalization.