Abstract: How to interact and connect environmental impact assessment and environmental management tools such as pollutant discharge permits is the key to the future reform of environmental governance system. Both systems have their own problems and corresponding paths of change in the current environment. Two different paths of change have a common value requirement,namely the connection and interaction between environmental impact assessment and pollutant discharge permit. However,the biggest controversy in the process of convergence is to maintain or simplify the environmental impact assessment approval. This difference in the connection ideas creates two diametrically opposite institutional logics:one is to maintain environmental impact assessment approval as the core,and the other is to To simplify the review of environmental impact assessment as the core. As far as China's current environmental impact assessment system reform direction is concerned,simplifying environmental impact assessment approval seems to be an irresistible trend. However,whether the two systems should be connected with the goal of simplifying the environmental impact assessment approval and emphasizing the discharge permit,the article is opposed. For this reason,in the connection structure between environmental impact assessment and discharge permit,the idea should be followed:to maximize the overall benefit with macro-efficiency; in the specific operation,in the context of "simplifying environmental impact assessment,look for The opportunity of strengthening; the idea of consolidating the structure of convergence in the process of decentralizing permits.