Abstract: Aiming at the unreal problem of the object motion and water wave diffusion in the large-scale surface solid-fluid interaction simulation, a real-time interactive simulation method for the large-scale water environment was proposed. Firstly, instead of the traditional overall height detail method, the method of partition simulation was utilized to imitate the large-scale water environment in real time and reduce the computational complexity. Secondly, the wave force was introduced during the motion of the object, combined with the custom wind factor, so that the object could float with the water wave on the surface of the water. While generating the interactive wave, the normal distribution function was introduced to calculate the triangular surfaces of the object, so the realism of the surface wave was enhanced. Finally, the attenuation equation including the fluid viscosity and the surface pollution was proposed to improve the wave equation, and the water wave diffusion was smoother and more stable. The experimental results show that the proposed method can simulate the motion of the object on the water more realistically, generate and diffuse water waves during the interaction more effectively.