At the same time, if the chocolate packaging or improper storage, there will be flowers, white, oil and insects and other phenomena, in addition, chocolate is also easy to absorb the odor of other items of the characteristics, some chocolate products will appear on the flavor, the shelf life is not synchronized and other images. The special properties of chocolate and the high requirements for sale are higher requirements for the packaging of chocolate, especially for the packaging not only with good resistance to water and gas resistance, temperature tolerance, light, acid loss, anti dialysis, mildew proof and insect proof and pollution prevention, but also for a long time to keep chocolate candy. Color, fragrance, taste and type. In addition, with the need of market competition, packaging requires unique forms of expression (including material, modeling and design, etc.), rich and colorful expression content (showing product form, characteristics and connotation, etc.) and the function of value-added products, promoting product sales and enhancing product added value.