Taking ‘Yueshuai’ apple as the material，the effect of modified atmosphere storage on the quality of apple was studied.The results indicated that the gas content improved and the fruit quality delayed with the plastic box modified atmosphere.The atmosphere controlled case with 3 holes open was better than with 2 holes open，the decline of firmness，soluble solid，total sugar，total acid content were eased evidently and the decrease of VC content was slowed down.The content of O2 reached equilibrum at the 7th day,and it was between 15.8% and 15.3% after 98 days storage；the content of CO2 reached equilibrum at the 14th day,and it was between 6.1%~5.9% after 98 days storage.