非物质文化遗产作为一种活态文化,其真实样态和内容存在于“人”这个媒介中。随着时间的流逝,其传承人也发生改变。不同的时间段、不同的传承人所传承的同一非物质文化遗产也存在不同的变更。文章以时间轴为基础,对非物质文化遗产的原真性原则进行分解,得出在时间维度下非物质文化遗产的原真性可分解为现在的原状、最初的原状和过去某个时间点的原状。此分解对非物质文化遗产原真性保护原则的可操作性和适用程度有一定的参考意义。 Intangible cultural heritage as a living culture, its true style and content exist in the “people” media. As time goes by, its successors also change. Different time periods, different heritage inheritance of the same intangible cultural heritage there are different changes. Based on the timeline, the article decomposes the principle of authenticity of intangible cultural heritage, and draws the conclusion that in the time dimension, the authenticity of the intangible cultural heritage can be decomposed into the original state, the original state and the original state at some time in the past . This decomposition has a certain reference value to the operability and application of the principle of authenticity protection of intangible cultural heritage.