This paper combines neural network with phase plane divisional control to generate a new intelligent controller—neural network phase plane divisional controller, which establishes, in the phase plane, real time corresponding relationships between the basic performance of the system response and not only the action logic division but also acting intensity, making control parameters in each divisional area able to automatically online regulate in accordance with the changes of the controlled object. The simulation result shows that the controller designed with this method has better closeloop performance and robustness. This method provides an effective controller designing way for nonlinear control system.