Abstract:Irradiation is the use of atomic energy ray irradiation sterilization of food to a physical method of food preservation. This method is applied to food sterilization can effectively suppress or even eliminate pathogenic micro -organisms causing rot. This article briefly described the development of domestic and irradiation technology， gamma-ray source， the nature and mechanism of interaction with matter and radiation sterilization， focusing on microbiological indicators and irradiated product irradiation process was determined to explore the gamma-ray irradiation sterilization used in food industry， the feasibility and advantages.