In this paper we design and evaluate the longitudinal nonlinear N(aub)z-CSAS(Command and Stability Augmentation System) flight control law in "DMI(Dynamic Model Inversion)-method" and classical "Gain Scheduling-method", respectively, to meet the handling quality requirements associated with push-over pull-up maneuver. It is told that the flight control law designed in "DM-method" is adequate to the full flight regime without gain scheduling and is efficient to produce the time response shape desired to the handling quality requirements. On the contrary, the flight control law designed in "Gain Scheduling-method" is easy to be implemented in flight control computer and insensitive to variation of the actuator model characteristics.n of the actuator model characteristics.