In order to clarify the research development dynamics of digitization of intangible cultural heritage, a systematic study is conducted using visual knowledge graph tools. CiteSpace knowledge graph analysis software is used to search with the keyword "digitization of intangible cultural heritage", and carry out literature visualization analysis on the amount of research literature on digitization of intangible cultural heritage, keyword co-occurrence network mapping, keyword emergence, and the evolution path of research trends. Based on the keyword co-occurrence network mapping analysis, eight clusters of research hotspots are identified, and the timeline function calculation of the keyword clustering mapping reveals that keywords such as interactive technology, information technology, motion capture and video narrative were prominent and became research hotspots during the period of 2019 to 2023. Besides focusing on digital communication and intangible cultural heritage itself, digital technology and digital methods are also the main research directions. In the innovation stage, the main emphasis is placed on the application of interactive technology and information technology in the experience of intangible cultural heritage. At the same time, the prospect of the development of intangible cultural heritage is looked forward to from the three dimensions of digital recording and preservation, digital scene experience and interaction and the shaping of a digital new business mode of intangible cultural heritage. The future development of intangible cultural heritage should boost the display and dissemination of intangible cultural heritage through the application of artificial intelligence design and digital technology, and promote the digital heritage and innovation of intangible cultural heritage by combining the integration of industry and education, so as to give new vitality to the traditional intangible cultural heritage.