Abstract: 【Purpose/significance】This paper analyzes the text of public comments on Sanxingdui self-media videos, and explores the modes and rules of public communication of Sanxingdui topics, which is helpful to protect and inherit cultural heritage, innovate the ways of communication and utilization of cultural heritage, deeply understand the thinking process of the public, and enhance the en⁃ thusiasm of the public to understand traditional culture.【Method/process】Taking the Textual Commentary about Sanxingdui of selfmedia video as the data source, based on the LDA model, combined with the text mining technology and other research methods, the re⁃ search is carried out in terms of the content dimension, time dimension and subject dimension【. Result/conclusion】Firstly, the public comments are centered on the two categories of "public archaeology topics" and "miscellaneous topics". Secondly, the public generally has a strong sense of sovereignty and protection of China's cultural heritage and has begun to pay attention to the derivative culture of Sanxingdui. Finally, opinion leaders play a significant role in guiding the archaeological topics of Sanxingdui【. Innovation/limitation】 The diversity of data sources, the degree of automation of data processing and the accuracy of the pre-processed corpus need to be im⁃ proved.