Abstract: In the context of residents being atomized and communities being fragmented, the continuing growth of the urban grassroots social organizations is an important guarantee to innovate social management, improve public services, strengthen social construction and cultivate civil society. The growth of the urban grassroots social organizations can not be fully explained from a single perspective of rational choice theory, historical institutionalism theory or social capital theory. Therefore, it is necessary to construct a comprehensive explanatory framework of interestidentityinstitution on the basis of the integration of the three theories. The growth of urban grassroots social organizations is the process of residents′ collective participation and collaboration in community public affairs under the mixed mechanism of interests, identity and institution.
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Key words: urban grassroots social organizations, interest, identification, institution, participation, cooperation