阴阳是中医理论中最核心和最基本的概念，三阴三阳在中医理论体系中也具有重要地位。对于三阴三阳的排序问题历代医家观点不一，争论颇多，是由于观察的角度不尽相同。本文从探讨阴阳与三阴三阳的由来及内涵出发，并分别以阴阳之气量、疾病传变顺序、疾病缓解顺序、对三阴三阳认识的先后、开阖枢运动5个不同角度来分析三阴三阳的排序问题，得出不同的排序结果。故认为三阴三阳的排序不是一成不变的，是随着观察角度的改变而有所不同。

Yin and Yang is the most core and basic concept in the theory of traditional Chinese medicine.Three Yin and three Yang also play an important role in the theory of traditional Chinese medicine.On the order of three Yin and three Yang, doctors of the past generations had different views, with many arguments according to different perspectives of observation.This paper discusses the origin and connotation of Yin-Yang as well as three Yin and three Yang, and analyzes the order of three Yin and three Yang from five different perspectives, namely, the amount of qi in Yin-Yang, the order of disease transmission, the order of disease remission, the order of understanding of three Yin and three Yang, and the movement of opening the closing.Therefore, it is believed that the order of three Yin and three Yang is not invariable, but varies with the change of observation perspectives.