The structural tension between the living nature of intangible cultural heritage (ICH) and the transformation of its living environment constitutes the fundamental predicament of ICH preservation. Digital preservation

as a technological solution to this predicament

raises a core controversy: does digital technology strengthen the possibility of living transmission

or does it move in the opposite direction of "heritagization" reducing living culture to archived memory? Based on the theoretical perspective of "living transmission"this paper first clarifies the academic connotation of digital preservation and its intrinsic logical relationship with living transmission. It points out that digitalization is not about "freezing" ICH into static archives

but rather

through technological paths such as knowledge graph construction and AR scene reconstruction

opens up possibilities for the dynamic preservation of "procedural knowledge." Furthermore

it sorts out the technological paths and typical cases of digital preservation from dimensions such as digital archiving and AI digital humans

revealing the deep challenges faced by current practices at three levels: value logic

property rights ethics

and the dissipation of aura.The research shows that the true value of digital preservation lies not in replacing living transmission with digital means

but in constructing a"digital presence"participatory transmission space

embedding digitalization into the culture practice system led by inheritors

avoiding the risk of technological alienation through the "minimal intervention" principle

and achieving a dynamic balance between technological empowerment and cultural authenticity.