本文以不同时期有不同的“老子”这一老学发展的共同规律为背景，较为系统地阐述了宋 元之际著名的道教学者杜道坚的老学著作《道德玄经原旨》与《玄经原旨发挥》中的主要思想，认为其 中的核心内容“皇道帝德”说反映了宋元时期以儒家的政治道德学说解释《老子》已达到了一个新的 高度，由此也可以具体真切地看出该时期孔老同归，儒道交融这种思想发展的历史总趋势。 Based on the common law of Lao Tzu different Lao Tzu during different periods, this article systematically expounds the old Taoist scholar Du DaJian’s “ Play ”the main idea that one of the core content of the“ Emperor Taoism ”reflects the Song and Yuan Dynasties Confucian political and moral theory to explain the“ Lao Tzu ”has reached a new height, which can also be specific and truly look During this period, the common trend between Confucianism and Taoism and the integration of Confucianism and Taoism were the general trend of development of this kind of thought.