Abstract: Consulting the definition of Stuart Cown: the design that coordinates with the ecological processes and minimizes the impact on the environment as much as possible is called eco-design. Landscape Ecology, the characteristics of ecological harmony, follows the principle of ecology and deploys the local plants. It mainly uses local materials under the premise of the least affect on the environment to unite the beauty of ecology and artistic and the functionality. The native plants are the ones that product or be original. Not only are they suitable to the land, but also easy to manage and maintain. The cost is also low. To give prominence to the concept of eco-design, the design of the Fragrant Hill Park in Zhangjiagang makes full use of local native plant resources. The surrounding orchard on the hillside spreads into the park to be the green area. And in the park they set up two pieces of farmland. In this paper, according to the protection and application of the native plants in the Fragrant Hill Park in Zhangjiagang, I will explain and elaborate on the application of eco-design in the ecological landscape design.