This paper aims to explore the design method of Augmented Reality (AR) children's literacy cards and promote the innovative development of children's literacy education products. This paper firstly sorts out the status quo of literacy education product design and the research status of VR/AR technology in the field of children's education, secondly analyzes the characteristics and advantages of AR technology when it is applied to children's education. It also discusses design strategies based on the characteristics of the children's group and related research on early scientific literacy. Therefore, this paper takes the design of osaurs" themed literacy cards as an example to study the design methods of AR literacy cards. The cards are designed through functional design that is multidimensional, card design that can render contextual cognitive atmosphere, realistic and interesting three-dimensional models and animations, as well as the interactive design that considers emotion and intelligence. At last the cards are succeeded in constructing AR situations and it is not beyond their capacity to increase children's learning interest and enhance their learning effects. This paper obtained a design method for children's literacy cards that can integrate AR situations, and used the Unity 3D engine and Vuforia plug-in to verify the design method. In conclusion, this design example can encourage children to learn actively and achieve the purpose of enhancing their learning effects. The article not only provides an example for the design of similar children's education products, but also explores more possibilities for children's education in the context of interactive media technology.