Abstract: Huai Nan Zi, as one of the representative works of Taoism in Qin and Han dynasties, contains abundant forestry thoughts, highlighting natural, political and humanistic theories whose basic connotation is that forests should be valued, protected and appreciated. Under the influence of Taoism, Huai Nan Zi reflects a strong sense of nature, integrity and harmony. These thoughts are extremely profound and outstanding in Qin and Han dynasties. In essence, they are the organic integration of natural ecology and humanistic ecology, whose core concept of nature-human integration and nature- human harmony has precious enlightenment on and significance to the realization of body-mind harmony and harmony of the world in modern human society.