Seismic data processing method for suppressing external interference

The invention relates to a seismic data processing method for suppressing external interference. The method comprises the following steps: dividing to obtain a plurality of frequency band intervals; respectively setting denoising intensity for each frequency band interval, respectively performing denoising, and combining the denoised shot gather records of all the frequency band intervals so as to obtain a shot gather record Y after the external source interference is suppressed; carrying out subtraction on the shot gather record S acquired in a three-dimensional mode and the shot gather record Y after the external source interference is suppressed to obtain a noise shot gather record N; and comparing the noise shot gather record N with the noise record Noise, and iteratively adjusting the de-noising intensity of each frequency band interval by taking the similarity between the noise shot gather record N and the noise record Noise greater than a set upper limit value as a target to finally obtain a correspond