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The integration of the amphibious armored vehicle hydrodynamic model and the roll motion based on the stability of sea navigation wave resistance were explored. First, the dynamic model of amphibious armored vehicles entering the water from land was established, and simulation analysis was carried out. Then, the model test was combined with the idea of ??integrated genetic algorithm system identification, and the identification model for the amphibious armored vehicle swaying motion was identified. The experimental design of the rolling motion of the vehicle on the water and the layout of the side body scheme verified the application effect of the discrimination model. Through research, it is found that the hydrodynamic model can accurately describe the stability of the amphibious armored vehicle when it enters the water from the land. The system identification method based on genetic algorithm can distinguish the rolling motion of the amphibious armored vehicle, which is the stability of the vehicle on water "S research provides direction.