As an important medium for information communication, Putonghua has been promoted greatly in various ethnic areas of China. From the perspective of Communication, Putonghua itself is a significant media symbol connecting different people and cultures. This paper firstly discusses the communication meaning of promotion of Putonghua in ethnic areas, and analyzes how public opinion leaders to play the role of in the promotion of Putonghua, how to popularize Putonghua according to the audience's needs and how to deal with the relationship between minority language and Putonghua on the basis of analyzing Putonghua promoters, receivers, media and controllers in ethnic areas.