Abstract: A fuzzy model called M-2 model which is similar to TSK fuzzy model is proposed.The mathematical equivalence between M-2 model and a 4 layer feedforward neural network is verified.Then a new algorithm to identify parameters of fuzzy model based on BP neural network is put forward.All parameters required for establishing M-2 fuzzy model are extracted directly from a BP neural network trained by sample data.A simulation example is given to demonstrate the effectiveness of the algorithm.