Fuliji Roast Chicken is a kind of special product of Anhui, China. But the chickens can not remain fresh for more than 2 or 3 days even in the winter. To solve the problem, the γ-ray irradiation preservation method has been developed.,Fresh chickens were packaged in vacuum with PP/PE or PET/PE plastic film and then irradiated with appropriate dose. TVB-N, amino-acid contents and the amount of bacteria were analyzed for the irradiated and nonirradiated chicken. In order to gain further knowledge of the radiation effects on protein, peptide and amino-acids, the model systems using Serium Albumin Bovine and complex amino-acids were set up. The effects of γ-radiation on the two systems under various circurmustances have been observed and discussed.,A vast amout of data has proved that the irradiation method for preservation has fulfilled the norms expected. The irradiated chickens are safe and hygienic.