As a representative of the perennial movement, Piet Oudolf designs flower borders to achieve a dynamic landscape effect, meanwhile the flower borders overall landscape becomes natural and wild. Firstly, through literature review, taking High line Park and Chicago Millennium Park flower border as examples, then analyzing the design of Oudolf’s flower border from the aspects of the plane, vertical, material and color structure. Eventually, analysis of his natural and wild style of flower border, to provide a reference for China’s flower border design.