Quality of frozen foods is influenced by freezing operation, storage temperature, food components and packaging systems.Packaging materials and atmosphere surrounded foods are important to quality changes of frozen products.The purpose of this paper is to review the packaging materials and technology used in frozen food to improve the quality of frozen products. The principle of phase transformation and glass transition in freezing process is introduced, and the glass transition of frozen food quality is explained.Migration of water is the major problem found in all frozen products.Several biochemical reactions during frozen storage are limited,but lipid and protein oxidation,enzymatic reaction and microbial activity will cause loss of quality and safety during thawing.Developed packaging technologies are discussed.Appropriate choice of packaging materials and operation can minimize changes and improve the quality of frozen food