Abstract: Taking the “Reed Grass Overlapping Pond” scenic area design in Nanning International Garden Expo as an example, this paper discusses how to transfer abandoned ponds in the site into better landscape, which adapts the Garden Expo functions and has elastic developing space in the future, providing reference for the development and design of similar projects.. It adopts the low-impact ecological philosophy to absorb rainwater and filter river water and blend them into human activities. By taking the manifestation of water as the main line throughout the landscape design, it creates the rainwater garden with artistic atmosphere. The scenic spot has become one of the most popular sights in the Garden Expo. The design has well balanced the exhibition and post-session development, providing a new idea for building ecologically sustainable gardens.