With the development of the Internet in social life,social identity is increasingly going beyond the boundary between individual identity and group identity in Internet communication,becoming social identity in a true sense,with noboundary limits and expansion of liquidityIn accordance with the actual changes in social life and social identity,studies of identity in social psychology and sociology have also undergone a turn from individual identity,group identity to social identityBecause of the development of the Internet,social space presents itself at three levels,accordingly,social identity which is based on the development of the Internet also presents a differentiation in levelsSocial identity in the Internet society mainly exists in the form of social representationThe social representation formed in Internet communication has surpassed limitations of individual representation and collective representation,which has important significance for the realization of social integration Durkheim proposedIn addition,as China has a large population,complex social differentiation,perceptual cultural tradition,democratic centralism polity and other special conditions,social identity takes on special significance in Chinas development and changes