To investigate the influences of film packaging with different thickness on the quality of postharvest Ipomoea aquatic. Ipomoea aquatica were treated with three kind of film packages : CK-32. 7 μm polyethylene bag with four holes,P1-32. 7 μm polyethylene bag and P2-12. 75 μm polyethylene bag at( 5 ± 1) ℃ with RH 90% ~ 95%. The results showed that film packages could decrease Ipomoea aquatica decay indexes. P1-treatment was more effective. In addition,P1-treated could significantly increase titratable acid,maintain high phenols content and antioxidant activity. Through the analysis of gas ratio of packages,we found that compared with other treatments,P1-treatment could maintain higher concentration CO2( 1. 6% ~2. 1%) and low concentration O2( 14. 8% ~17. 5%),which was essential to keep the good qualities.