Aiming at multi-variable nonlinear flight control system，this paper analyzes the analytical inverse system in theory detailedly. By the tracking principle of neural network, a dynamic neural network is presented, which consist of static neural network and integrators. The paper designs a control method of dynamic inversion with neural network used for multi-variable nonlinear flight control system, and makes simulation of flight control system of power parafoil. Simulation results demonstrate that the control method has strong ability of control and robustness.