In the Song Dynasty, Taoism Nanzong effectively enhanced the state of Taoist Alchemy Practice and improved the theoretical quality of Song Taoist philosophy with the assimilation and the integration of Confucianism and Buddhism thought based on Taoism which followed the times of the main current of the integration of Confucianism, Buddhism and Taoism. With a In-depth study of the theoretical system of Zhang Boduan and Bai Yuchan who were the representative figures of Taoism Nanzong, this article tried to reveal the new transformation and the Influence of Taoism Nanzong which took the Mind-Nature Theory as the purport and The integration of Three Religions as the main features.