In the past, the research on the communication channel of China’s national image is too much manifested as "media-centrism", especially emphasis the role of the mainstream media, that neglects the multi-channel characteristics of the national image transmission, so which makes the national image communicate only one channel and limited its effection. By the global integration and the impact of changes in the ecological landscape of the media, bridges, organizations, media can play a channel function. This article made a deep description of the three channels, then we build a channel model, to clarify the relationship between channels and pointed out that the national image of external communication channels shoud be integratedand to achieve external three-dimensional communication.