Abstract：The purpose of this study was to analyze the effects of 60 Co gamma irradiation on the quality and sterilization of Puer-tea.The results showed that 60Co gamma irradiation could effectively kill the microbe contaminating puer-tea，controled the amount of microbe less than 1.0×103 cfu/g while the initial contaminated amount of microbe is Less Than 1.0×105 cfu/g, and had no significant influence on the principal sensory quality and components of Puer-tea at the doses of 3.6 kGy～5.0 kGy.