Based on classical mass-communication theory and modes, we attempted to summarize existing ways of climate change knowledge products preparing, main communication route, and practice experiences, for providing further reference to study and practice on climate change knowledge communication in the future. It is concluded that, climate change knowledge communication process should follow the basic rules of information communication, and fully consider the complexity and interlace characteristics of climate change knowledge. In terms of knowledge gathering, we emphasized scientificity, systematicness, accuracy, and authority of the information. In terms of displaying mode, we emphasized readability, interestingness, simplification and popularity of the content. In terms of transmission, we specially emphasized using of emerging internet and social media platforms, to promote the roles of interpersonal relationship network, in addition to the traditional mass media. Under the new situation of national economic and social development, it is necessary to further strengthen the innovative research on the theory, mode and practice of climate change knowledge communication.