Abstract: The demand for collaborative governance in urban communities in the context of new urbanization has further increased, and the problems of poor coordination among multiple subjects and inefficient resource allocation in community governance have been highlighted. Based on the perspective of complex system adaptation theory (CAS), this paper analyzes the causes of the dilemma of collaborative governance in urban communities through a survey of community H. It is clear that the complexity of community governance subjects, the complexity of the governance process and the complexity of the environment in which subjects collaborate lead to the deficiency of collaborative governance in communities. On this basis, we propose a realistic path to improve collaborative community governance from three dimensions, namely, the improvement of the subject′s capacity, the deployment of environmental resources and the construction of information system, and provide ideas and methods for establishing a benign interactive and open collaborative governance system in urban communities.