The life cycle assessment(LCA) of canned potato chip packaging was conducted covering the phases of acquisition and processing of raw materials, transportation from manufactures to consumers, use of packaging containers, recycling and waste disposal etc., with the energy consumption and environmental impact also being evaluated. The conclusion showed: environmental impact of the composite packaging is mainly in the material acquisition phase, i.e. the fuel consumption. The environmental impact of paper processing is much greater than those of plastic and aluminum. The impact of three disposal methods of landfill, incineration and recycling were focused on fossil fuel consumption, land occupation and inorganic substances damage to human body. Therefore, material reduction and container lightweight are the most direct and effective ways to improving packaging environmental adaptability while maintaining the existing structure.