Abstract: The paper intended to study the effects of controlled atmosphere on post-harvest quality of Xinjiang Zizyphus junzao-Jujuba Mill. during cold storage,to provide scientific basis for choose appropriate methods for fresh-keeping of Jujuba. Jujuba were selected as the materials to precoolling under 0 ℃,and packaged in PE bags that were filled by five different ratios CO2 and O2,and then stored at-1 ℃. Nine indexes were analysed by different treatments during storage,such as fruit respiration rate,relative conductivity and total sugar so as to screen appropriate treatment. It was showed that both 1% CO2+5% O2 and 1% CO2+3% O2 had remarkable effects which could reduce the respiration 26.76%~32.94% and even the treatment 1% CO2+5% O2 could delay the peak value to rise after a fall for 10 days. And then,the two ratios could reduce the ethylene production about 22.56% and even could delay the peak value to rise after a fall for 10 days and 20 days respectively,delay relative conductivity to ascend with 85.77% and 73.49% respectively. The treatments were helpful to protect the integrity of the cell membrane system,prelong the fresh time and slow the decline of total sugar and total acid,and also had proper storage effectiveness.