The classification of domestic waste is one of the “key little things” for the high-quality development，the fine management and the construction of an international harmonious and livable metropolis of the capital city. In recent years，with the extensive publicity and mobilization of the government and society，residents’ awareness and action on waste classification have been greatly enhanced. Since the second anniversary of the implementation of the newly revised Beijing Domestic Waste Management Regulations，social organizations，as one of the main roles in the social governance system，have been an important force to promote the participation of multiple subjects in community waste classification. This paper analyzes the role and problems of social organizations’ participation in community waste classification from the perspective of collaborative governance through several practical cases of social organizations’ participation in promoting community waste classification，and proposes countermeasures to further expand social organizations’ participation from the dimensions of policy support，cultivation development，function display and ability promotion.