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In this paper, a nonlinear model predictive control (NMPC) algorithm based on differential evolution (DE) and radial base function (RBF) neural network is proposed. RBF neural network is used for the modeling. And DE algorithm is used to solve the optimal predictive control input due to its characteristic of global optimum, easy implementation and fast convergence. The simulation results on the pH control of the neutralization rector by the proposed DE-RBF-MPC show that this control strategy is effective.