Abstract: Building social governance community is an important way to promote the modernization of social governance in the new era， and also an internal requirement for building a new pattern of co-governance and sharing social governance. As an important resource embedded in social relations， social capital， which takes social trust， network participation and reciprocal norms as the core elements， has close logical relationship with social governance community， and is an important factor for building social governance community. In the period of social transformation， social capital is declining day by day， which is mainly manifested in the lack of social trust， weak network participation and breaking of reciprocal norms， thus constituting a practical constraint on the construction of social governance community. To promote the construction of social governance community， the stock of social capital should be accumulated and the quality of social capital should be improved by adhering to the guidance of Party building， reshaping social trust， expanding network participation and strengthening reciprocal norms.

Key words: social governance community; social capital; social trust; participation network; reciprocal norm