Abstract: In order to investigate the effects of different controlled atmosphere storage conditions on the postharvest preservation of kiwifruit,the Xuxiang kiwifruit were stored under the 4 different controlled atmosphere(2% O₂+3% CO₂,2% O₂+5% CO₂,5% O₂+3% CO₂,5% O₂+5% CO₂)with the temperature 0℃. The fruit hardness,soluble protein contents,vitamin C contents,total phenol contents,malonaldehyde(MDA)contents,peroxidase(POD)activity and polyphenol oxidase(PPO)activity were detected to evaluate the preservation effect. As the results,controlled atmosphere storage effectively maintained fruit hardness,delayed the decline of soluble solids,vitamin C and total phenol contents,inhibited the increasing of MDA content and PPO activity,maintained the higher level of POD activity,which effectively prolonged the storage period of kiwifruit. In summary,2% O₂+5% CO₂ had the best fresh-keeping effect,which could maintain the quality of the kiwifruit,increasing the contents of antioxidants,and delay the aging rate of fruit.