Intangible cultural heritage is an irreplaceable precious cultural resource. Under the premise of scientific protection and rational utilization, the application of modern scientific and technological means can break through the bottleneck that is difficult to sustain for the protection and utilization of cultural heritage. This article is based on the protection of intangible cultural heritage based on digital modeling technology. Based on the "tacit" feature of intangible cultural heritage, digital collection, storage, extraction and other technologies are used to fundamentally change the way of protection and utilization. It should be displayed from physical protection. The on-site protection display is transformed into a digital protection display, so that intangible cultural heritage resources can be effectively protected and used by 7.2%.