The meaning of flattening. Flat, the word comes from the style and shape we need to use for this kind of cosmetic packaging box design, it does not belong to the Chinese secondary world at all. The earliest from a corporate financial management, intended to remove the vertical redundant structure, to reach the horizontal development of efficient management personnel organization theory system. Later was gradually applied to the visual technology design, decorative arts effects, which is characterized by the removal of redundant perspective, texture, volume and other 3D elements, deletion of simplified highlights the student information has an important research content, presenting a clean and tidy interface of a different style of product design.