Low-altitude economy refers to an economic form that leverages low-altitude flight technology to promote the development of related industries; It has an importance in the national development strategy. The food industry, as a core part of public life, is particularly closely integrated with the low-altitude economy. The drone industry is at the heart of the low-altitude economy, and this paper systematically analyses a range of drones applications in the food industry within the low-altitude economy, in particular the practical applications and challenges in the areas of drone monitoring of the growth of agricultural products, conducting related agricultural activities, delivering food supplies (including takeaways, perishable food, etc.), and aerial photography. Although the application of low-altitude economy in the food sector has shown initial promise, it faces a series of problems such as limited consumer acceptance, underdeveloped industrial depth, and inadequate legal and regulatory frameworks, etc. There is an urgent need for the government to introduce more supportive policies to facilitate the further development and application of low-altitude economy technologies in the food sector. Additionally, sustained technological innovation is the key to ensuring long-term progress in this field, alongside public convenience. In addition, this paper also discusses how scientific and technological innovation, along with policy guidance can solve the possible problems in the current development of low altitude economy, promote the deep integration of low altitude economy with the food industry,and drive the prosperity of related sectors.