The food safety problem of college canteen has been highly concerned by the school. However, the digital construction of college canteen is overlooked by most colleges in the process of digital campus construction. In the era of digitization and informatization, big data can be used in the canteen to integrate information, improve management, improve the quality of service, and improve the quality of food. This paper applies big data to the canteen management and explores the law from the data, to improve the canteen management and better serves the students.