In order to solve the problem of low fidelity and poor timeliness of the existing sea clutter simulation methods,the two-dimensional diffusion model in the field of artificial intelligence is used for sea clutter simulation,and the fidelity of sea clutters generated are tested in terms of amplitude distribution,spatial-temporal correlation as well as fractal features.Numerical analysis indicates that neural networks such as diffusion models can generate high-fidelity simulation data in a short time.