Suiyuan Garden in Kunshan was the private garden of Xu Qianxue in the Qing Dynasty, was located at the northern foot of Yufeng Mountain. In the context of the reconstruction of Tinglin Park, Chen Congzhou guided the positioning of Suiyuan Garden and promoted the specific design on-site from 1983 to 1984. Suiyuan Garden is the only mountain garden in his garden works, with the characteristic of a real mountain and water. Combining literature materials, interviews, and field research, this paper sorts out the evolution history of Suiyuan Garden since the Song Dynasty and the process of contemporary reconstruction, analyzes its gardening methods guided by Chen Congzhou, such as mountain-based situation, water-based landscape, and separation-based fun, in three aspects of ‘site selection, natural water arranging and flower planting’, and finally summarize Chen Congzhou’s gardening concept of “according to local conditions, returning nature and preserving the true core” in the reconstruction of Suiyuan Garden. Chen followed the landscape pattern, traced the meaning of the ancients, and continued the previous works of the garden, thus promoting and realizing the inheritance and continuation of the culture of the Suiyuan Garden.