Abstract: As an important force to mobilize and organize the grassroots national fitness activity, community sport organizations face a series of dilemmas such as the "atomic state" of grassroots society, the spillover of social relationship, the tension of community autonomy and the emergence of virtual community etc.Therefore, it is necessary to focus on the analysis of individual social network in the research paradigm, to cultivate the elderly "elite" of sports, to reconstruct the "acquaintance society", to pay attention to the stratification of sports demands, and to establish off-site sport organizations via the link of "common hobby", and to integrate online interaction with offline participation in the Internet+ era.