The in-depth involvement of 5G, big data, cloud computing, and artificial intelligence has had a comprehensive and profound impact on the media ecology; the decentralized communication method has caused great changes in communication concepts and modes. Under the new media ecology, mainstream media must further transform and optimize the communication process if they want to continuously present and diffuse their core competitiveness. In terms of the main body of communication, it embodies the empowerment of communication from one to multiple; in terms of communication content, it focuses on precise services from aggregation to distribution; in terms of communication channels, it deepens the cross-border coupling from “addition” to “combination”; in terms of communication objects, it adapts to the qualitative change in positioning from audiences to users; in terms of communication effects, it realizes the “black hole” ironing from acceptance to cognition, and serves to construct a new communication dominated by mainstream media.