Fine structural design of sales package will not only protect the products and benefit the transportation, but also can promote the sales and help the enterprise achieve economic benefits. At present, the structural design of sales package in China witnesses the phenomenon of over-packing and homogenization, together with the problems such as improperly selected packing material and unreasonable design in production process. In order to solve these problems, some principles could be followed in the structural design of sales package such as suitable relationship between form and volume, environmental-friendly packing material, rational production process and diversification in design.