Abstract: The equilibrium model of local government environmental regulation is established based on the Stigler-Peltzman model of interest group theory of regulation under Chinese style decentralization. The implementation equilibrium of environmental regulation is studied based on the formulation equilibrium of environmental regulation as a benchmark. The influencing factors of implementation equilibrium of environmental regulation are analyzed. The results show that the departure from implementation equilibrium to formulation equilibrium in environmental regulation is theoretical basis for the environmental regulation failure, and the deviation degree represents the severity of regulation failure. The implementation equilibrium of environmental regulation is affected by the weight coefficient of environmental quality index and economic growth index in achievement assessment system, and the influence coefficient of corporate profits to economic income of local government. The reduction of departure from implementation equilibrium to formulation equilibrium is possible approach to prompt the implementation of local government environmental regulation.