The invention relates to a submarine cable land inspection noise attenuation method, comprising the following steps: simulating land inspection original seismic data with an AVO phenomenon by utilizing 3D high-order Tau-p inverse transformation; performing Tau-p direct transformation on the original seismic data by adopting 3D high-order high-resolution Tau-p transformation, so that Tau-p domain seismic data is obtained; setting slope parameters, and performing zero setting processing less than a threshold value on the Tau-p domain seismic data; inputting the Tau-p domain seismic data after zero setting into the 3D high-order high-resolution Tau-p transformation and performing Tau-p inverse transformation on the 3D high-order high-resolution Tau-p transformation, and transforming into a time domain, so that noise data is obtained; and subtracting the noise data obtained through the inverse transformation from the original seismic data, thus the original seismic data after a noise is removed is obtained. The method provided by the invention meets high resolution, sparsity and amplitude preservation of transverse wave interference of submarine cable land inspection and requirements of a 3D acquisition system.