The construction of Beijing Urban Sub-center is National strategy for Millennial plan. It is one of the two wings of Sustainable development in Beijing. Tongzhou District faces numerous challenges in grassroots social governance。It must be given higher demands on the Grassroots Social Governance. it is related to the success or failure of the construction of Beijing Urban Sub-center。It must be Put it in consideration of the success or failure that Social Organizations Participate in the Grassroots Social Governance in Beijing Urban Sub-center Tongzhou District have to implement multiple measures to promote social organizations to participate in Grassroots Social Governance at the same time and build Beijing sub center into a good city