Intergovernmental collaborative governance is regarded as an important means to solve the problem of cross-domain environmental pollution,but the practice of intergovernmental collaboration may produce collaborative inertia that makes the collaboration difficult to achieve.Based on 12 cases,this paper adopts the method of Crisp-set Qualitative Comparative Analysis and constructs the“structure-process”analysis framework to explore the complicated influence mechanism on the effect of intergovernmental collaborative governance in cross-domain en...