In this paper, the relevant documents were screened out by subject word search on the Web of Science website, and the keyword co-occurrence knowledge map of the relevant documents was drawn using CiteSpace software to analyze these documents as a whole. Then the author studies the current development status of the traceability system of the food supply chain under blockchain technology, and finds that the combination of the internet of things and blockchain technology is becoming the mainstream trend in the development of the traceability system of the food supply chain. Finally, the future development trend of the traceability system of the food supply chain under blockchain technology is looked forward, including current advantages and future challenges.