The packaging bag materials of modified atmosphere packaged food are as follows: 1, coffee, milk powder packaging bags, packaging material: aluminumPET/pe 2, Hard cheese packaging bag, packaging material: aluminum plating PA/PE 3, Small bread bags,: Packaging materials:PET/KPE, PP/KPE 4, cooked meat, soft snack packaging bags, packaging materials:PET/PVDC/PE,PET/PVDC/ionic polymer 5, Fresh noodles packaging bag, packaging materials:BOPP/PE,PVC/PE 6, split meat packaging bags, packaging materials:PET/PVDC/PE,PE/PA/PE