Abstract: To study the pitching stabilization performance of super-large ships under severe sea conditions,this paper takes the tanker " KVLCC2 " as the research object. A weighting matrix is utilized to stabilize its transfer function model in Mathematica,and the stability of the model is verified using the root trajectory shaping method. Subsequently,a simplified first-order closed-loop gain-shaping algorithm is applied to design the robust controller. In addition,a dual nonlinear feedback control algorithm is proposed to be incorporated into the control system to further enhance its pitching stabilization performance. To validate the effectiveness of the dual nonlinear feedback control system for pitching stabilization,wind scale of 7 and 8 wind and wave models along with perturbation links are introduced into the system for simulation experiments. The experimental results demonstrate that even with a time lag constant of 0. 15,the dual nonlinear feedback control system effectively improves the ship’s pitching stabilization performance under rough sea conditions. The proposed dual nonlinear feedback control system can provide technical support for the smooth and efficient navigation of super-large ships in varying sea conditions.