The collaborative governance of Chengdu-Chongqing Economic Circle is an important opportunity to promote the high-quality development of Chengdu-Chongqing region and the key to promote regional collaborative governance lies in the effective integration of governance actions, the interaction of governance resources and policy learning. In order to explore the logic of collaborative governance of Chengdu-Chongqing Economic Circle and provide Chengdu-Chongqing experience for China's regional collaborative governance.This paper takes 351 intergovernmental collaborative governance policy texts of Chengdu-Chongqing Economic Circle as the research blueprint and carries out content-coding analysis from the perspective of network analysis of institutional collective action theoretical framework. The research focuses on individual network analysis and overall network analysis and introduces the concept of strong and weak linkages to see into the collaborative governance process of the Chengdu-Chongqing Economic Circle. The results show that the collaborative governance network of Chengdu-Chongqing Economic Circle has experienced the evolution from limited sharing network to dual-core leadership network, and the primary role of Chengdu-Chongqing Economic Circle is gradually obvious; the secondary system of internal collaborative governance of Chengdu-Chongqing region has basically formed, which promotes the coordination and integration of the overall system action; administrative and regional segregation are the main obstacles of collaborative governance of Chengdu-Chongqing Economic Circle,which need to be coordinated and be promoted with function as the leading factor by the provincial government at the higher level. In the future, the collaborative governance of Chengdu-Chongqing Economic Circle needs to focus on the creation of collaborative mechanisms, optimization of spatial layout, and policy coordination and convergence, so as to jointly create a new pattern of collaborative governance of Chengdu-Chongqing Economic Circle.