Abstract: The natural plants landscape has quite significant value, which can meet the natural desire of urban residents and can realize ecological conservation garden. The High Line Park as one of the most famous city landscape design in the 21st century, its many aspects are worth for study, the aim of plant designers is to keep the natural plants wild and create a natural plant landscape. This article describes the design concept of plant designer Piet Oudolf, and analyzes the natural plant communities, plant selection and the natural plants landscape in the High Line park, in order to give a revelation for the garden plant landscape of our country.