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In order to improve the motor performance,the control law design is particularly important in modern airplane design because it is developed into static instability for higher mobility. This paper is based on the flight simulation needs, using nonlinear dynamic inversion method to bulid the linear model of the aircraft, and then using the PID control theory to analyze and design system of the plane for the horizontal guidance with the large civil aircraft design as the application background. Using Matlab/Simulink numerical simulation method and the Stateflow tool for PID adjusting parameters and simulating. The analysis shows that the controller can achieve the required control accuracy well and has the good dynamic quality.