With the WeChat as the representative of the rise of new media，the mass media is no longer the only platform for social members to share cultural meaning and construct identity.A pattern of multicultural coexistence to create.In this paper, through a long-term depth observation of a Yi WeChat Group in Guizhou, Discover the daily information interaction of the WeChat group, including social group consciousness can be gathered through the reconstruction and sharing of collective memory，demonstrate the power of social groups，arouse national identity consciousness, strengthen the cohesion within groups by sharing common beliefs and values in order to realizing the identifcation of national identity.