In the "post-Internet era", there are many potential risks and challenges in the field of cultural communication. With the development of AI technology and the use of more and more extensive in the field of culture, the use is becoming more and more widespread and influential, and has become one of the future development areas. The current development of AI is rapidly changing, AI technology is constantly updated and breakthrough. Based on AI to achieve information transmission, processing, processing and other functions have been widely used in medical, education, transportation, finance, tourism, military and many other fields. In the field of cultural propaganda, it is important to make full use of AI to realize various functions, spread advanced cultural achievements and information, and popularize scientific knowledge more efficiently to shape national ideology and culture and improve national soft power. . This paper intends to analyze the possible risk problems of AI in the field of cultural propaganda and propose corresponding countermeasures. Based on the basic principles and ways of cultural communication, this paper discusses the current situation and development trend of AI application development in the field of cultural propaganda. It is proposed that the risk prevention and control of cultural propaganda based on AI algorithms should pay attention to the existence of "data islands", algorithm abuse and other problems and the application of related technologies to be improved; hot issues in the field of cultural propaganda based on AI algorithms can draw on the successful experience of AI in the field of cultural communication to deal with the corresponding And form a strategy.