At present, artificial intelligence technology is experiencing rapid development, and artificial intelligence has a significant impact on human production and lifestyle, as well as the political and cultural aspects of society. In recent years, the rapid development of artificial intelligence, in the context of this era of development, for the national cultural communication, how to faster and better adapt to the general trend of the times, and constantly interchange and improve become an important issue. As an indispensable part of the world’s civilization, Chinese ethnic cultures cannot only focus on their domestic inheritance but also should establish an external spreading pattern, thus promoting their own development as well as the diversity of the world’s cultures. This article discusses the implication of AI technology for the promotion of Chinese ethnic cultures’ external communication. AI technology can be used in text translation, data mining, communication channel analysis, etc. It is more efficient and accurate than experienced journalists and editors in collecting big data to develop selected topics and research, judge the direction of ethnic culture communication, and discover the content that users are interested in. At the same time, the instrumental and auxiliary roles of AI translation can be used to improve the construction of ethnic culture corpus. Through the analysis of the data from the survey and experiment, it is found that the media of ethnic culture communication has changed dramatically since 2016. In 2016, the highest proportion of television channels was 70%, but in 2021, the proportion of television channels dropped to 23%, and Internet and book communication have become the “main force,” of which the proportion of Internet is 59% and the proportion of book channels is 48%, and the popularity and growth speed of the mass media ranked first. The modern intelligent technology can be used to spread Chinese ethnic cultures more widely and effectively. It has a far-reaching influence in that, it can promote the inheritance and innovation of Chinese ethnic cultures, and to improve ethnic groups’ confidence in their own ethnic cultures.