Method and system for attenuating seismic data random noise

The invention discloses a method and system for attenuating seismic data random noise. The method includes: seismic data are obtained; Fourier transform is performed on the seismic data to generate frequency-space domain seismic data; plural empirical mode decomposition is performed on the frequency-space domain seismic data in the space direction to generate a plurality of modal components; an optimization method is used for generating self-adaptive signal reconstruction operators according to the frequency-space domain seismic data and the plurality of modal components; frequency domain seismic signals are reconstructed and generated according to the self-adaptive signal reconstruction operators and the plurality of modal components; Fourier transform is performed on the frequency domain seismic signals to generate time domain seismic signals after the random noise is attenuated; and a seismic section image after the noise is attenuated is drawn according to the time domain seismic signals after the random