This paper deeply discusses the application of fractal geometry in many aspects of children's toy shape design.Firstly,it introduces the concept of fractal geometry and its basic principles.Then,it deeply explores the applica-tion value of this theory in the field of children's toy design,including enhancing entertainment value of toys,enriching connotation of education and stimulating children's inno-vative thinking and imagination.Finally,Many application examples of fractal geometry in the field of children's toy shape design are deeply analyzed,including modular design,random design,curve and curved surface design and itera-tive from design.The application of fractal geometry in the shape design of children's toy not only makes children's toys more attractive and fun,but also helps to stimulate children's cognitive ability and creative thinking.