The advantages of high-frequency ground wave radar with long detection range, all-weather, and real-time accurate detection are widely used in the field of target detection. Aiming at the problem that sea clutter can interfere with target detection, this paper comprehensively evaluates the target detection method in the background of sea clutter from the aspects of nonlinear prediction, fractal, subspace decomposition, and cancellation. Summarize relevant domestic and foreign literature, and put forward the prospects of the current methods. It provides a reference for further research on the problem of sea clutter interference in the future.