The development of traditional supply chain services faces many pain points, including forgery risk, enterprise information silo, failure to the cross-level transmission of core enterprise credit, and default risk. To tackle the problems of information silos of supply chain enterprises and unauthorized access to network resources by illegal users, this paper proposes an access control model based on smart contracts and enterprise credit to guarantee the data security and integrity of fruit quality traceability system. Combining role-based access control (RBAC) and attribute-based access control (ABAC), the model takes smart contracts as the underlying technology, enterprise credit values as reference attributes for cross-domain access, and subject attributes and credit values as decision bases to realize intra- and inter-domain access control. The experimental results show the effectiveness of the access control model proposed in this paper.