According to Qian jianping, food trade has become an important factor in meeting global food demand.Strengthening bilateral or multilateral trust in food trade is of great significance to promoting sustainable development of trade and enhancing in-depth cooperation in the context of global food crisis.However, in many countries and regions, there is still a lack of reliable traceability systems for cross-border movement of food.Blockchain is essentially a distributed public ledger, with technical features such as decentralization, detrust, collective maintenance, and reliability.At present, blockchain has developed into the 3.0 era, expanding from the financial field to digital finance, Internet of Things, intelligent manufacturing, supply chain management, digital asset trading and other fields.