Abstract: In order to establish the preservation method of chive stems under cold storage by modified atmosphere packaging（MAP）, the fresh pre-cooled chive stems（200±0.5） g were sealed and packaged into 25 cm×60 cm polyethylene（PE） film bags with the thickness of 10, 20, 25, 30, 45 μm respectively, and stored at（0±0.5） ℃ for 105 days.Then the effects of different film transmittance of O₂ and CO₂ on the volume fraction of O₂ and CO₂ in packaging bags and the qualities of chive stems during storage were investigated. The results showed that polyethylene film packaging with different O₂ and CO₂ transmittance could inhibit the deterioration of chive stems qualities. There were significant differences in the volume fraction of O₂ and CO₂ in bags among different treatment groups（P＜0.05）. The 45 μm PE bag treatment(O₂ transmission of（4 080±352） cm~3·m^-2·d^-1·0.1 MPa^-1 and CO₂ transmission of（16 566±1 415） cm~3·m^-2·d^-1·0.1 MPa^-1) for 15 d showed a significant decrease on the volume fraction of O₂ in bags, and then the volume fraction of O₂ remained at 3.94% to 6.66%（except for the 105th day）. The volume fraction of CO₂ in the bag decreased significantly in the first 60 days of treatment, and then remained at 3.07%～3.53%. This treatment effectively inhibited the etiolization, flower buds opening and decay of chive stems. The cellulose contents were maintained at a low level when stored for 105 days, and the chive stems still had commercial value. Therefore, packaging chive stems with polyethylene film can maintain their commercial value during low-temperature storage and extend their shelf life.