As China has been increasingly drawing the world's attention，the international communication and broadcasting work of China also gradually reshapes the global mass communication. Based on the first hand data of the China Global TV Network，and by focusing on the efficacy of communication，this study analyses the platform，innovation of content，and innovation of broadcasting brought by CGTN. Moreover，the upgrade of the propagation force，guiding force，and credibility of CGTN is being studied. In the end，the study proposes further suggestions on improving China's international communication.