Abstract: Considering the difference between model and reality model coefficients of large-scale industrial processes are treated as fuzzy numbers, and an interaction balance method based on fuzzy model is proposed in this paper. Three types of interaction balance method, general interaction balance method, interaction balance method with global feedback and interaction balance method with double iterative techniques are studied. Simulation shows that the method provides a faster convergence and better objective function. Furthermore double iterative techniques with fuzzy parameters is the coordination method that requires the smallest number of on-line iterations so far.