Abstract:As a large agricultural country，China's agricultural product processing industry has developed rapidly，and its by-product yield is also very large.However，the reuse of by-products，especially high-value utilization technology is relatively backward，resulting in unnecessary waste of resources and environmental pollution.As an emerging technology，nanotechnology had been more and more widely used in the food field in recent years.It reviewed the application status of nanotechnology in high-value processing of agricultural byproducts，especially those from fruits and vegetables，grain and oil and aquatic products.