Many children’s drawing game apps on the market do not meet the needs of children and parents very well. Based on the characteristics of children’s development, this paper explores the interaction design method of preschool children’s drawing apps. Firstly, the psychological and physiological characteristics of preschool children are analyzed with the theoretical support of child development psychology, and then the interaction design of children’s art drawing game apps is taken as the object to analyze the current situation of preschool children’s art drawing game apps and propose the interaction design method applicable to preschool children’s drawing game apps. This paper proposes the applications of adapting the interaction of preschool children’s art painting game app to meet the optimization of the interaction design method of preschool children’s art painting applications in the way of art-assisted education. Provide development ideas for more apps suitable for preschool children.