Abstract:The antioxidant and antimicrobial activities of volatile oil from ginger by supercritical CO2extraction were studied.Evaluation of the antioxidant effect of volatile oil from ginger was focused primarily on scavenging of 2，2-Diphenyl-1-picril hydrazyl radical（DPPH·），superoxide negative ion radical（O2-·）and hydroxyl radical as well as reducing capacity.The data showed the volatile oil of ginger had an antioxidant activity，activities of eliminating DPPH·，O2-·，hydroxyl radical and reducing capacity.Under the conducted experiments the volatile oil from ginger by supercritical CO2extraction also demonstrated a good antimicrobial activity to the microbial strain tested，penicillium was the most vulnerable to the volatile oil from ginger（MIC，MBC 0.78%），followed by aspergillus niger（MIC 0.78%，MBC 3.13%）.Compared with bacteria，volatile oil from ginger had a higher inhibiting ability to fungus.