The work aims to determine the optimal radiation-tolerance absorbed dose process of common plastic packaging materials and then study the effect of 60Co gamma irradiation on the color, tensile strength and elongation of the plastic packaging materials. Ten kinds of plastic packaging materials commonly used in the market were selected, including polyethylene (PE), polypropylene (PP), polyamide, polyethylene composite bag (PA/PE), et al. and then irradiated by 60Co gamma in different irradiation dosage to analyze the variation of the chroma value, tensile strength (Rm) and elongation (εt). When the irradiation intensity was greater than 6 kGy, the ΔE value of PE, polyvinylidene chloride (PVDC) and polyvinyl chloride (PVC) was larger than 6, which was visible to the naked eye. The total color difference (ΔE) value of the other seven materials was less than 1.51, and there was not significant change in the total color difference. There were significant differences between Rm and εt in polycarbonate (PC) and polyester/polyethylene bags (PET/PE) (P<0.05). Irradiation had no effect on the mechanical properties of PA/PE, polyester/aluminium foil/polyamide composite bags (PET/AL/PA) (P>0.05). There was significant difference in Rm of PA and PVDC, but not significant difference in εt. The Rm and εt of other six kinds of materials were significant or extremely significant (P<0.01). The irradiation dose of PE, PVDC and PVC plastic packaging should be controlled within ≤3 kGy; The irradiation dose of PP should be controlled within ≤10 kGy; The irradiation dose of PC should be controlled within ≤15 kGy; The irradiation dose of PET/PE in the range of 0~40 kGy is relatively tolerant, and the irradiation dose should be controlled within ≤40 kGy.