Preschool children belong to a special group. In order to study method of food packing design of them, this study firstly investigates children's food market, some parents and teachers of kindergartens, as well as some food security regulators of the relevant food security management departments. Then the article comes up with 5 design factors: the packing opening way, intelligence functions, graphics, color and text, which have greater impact on preschool children's food security. Based on these 5 factors; combined with the physiological and psychological characteristics of preschool children, it systematically analyzes the design method of the food packing security.