Abstract: The quality and safety of grains and oils concerns national stability and development, but there are currently many problems with the quality and safety of grains and oils, especially the fact that reliable and efficient data interconnection between heterogeneous systems cannot be guaranteed. Firstly, based on analysis of the characteristics of information flow in the grain and oil quality and safety chain, its architecture was constructed, and the key information in the typical links was classified. Then, based on the trusted blockchain and trusted identification, a trusted traceability model for the quality and safety of grains and oils was constructed, the block data structure, identification system coding rules, and storage mode were defined and reconstructed, and the concept and specific architectural scheme of chain network connector were innovatively proposed. Finally, a trusted traceability system for wheat quality and safety was developed based on the Hyperledger Fabric framework, verified and applied to case analysis. The results showed that the proposed model and system allowed information interconnection in the grain and oil quality and safety chain, and ensure the safety of cross-chain information interaction and the traceability of the whole process.

Key words: grain and oil quality and safety; information traceability; trusted blockchain; trusted identification; chain network connector; food safety