Complex surface anisotropic multi-component seismic data pre-stack depth migration method

The invention relates to a complex surface anisotropic multi-component seismic data pre-stack depth migration method, which comprises the following steps of: acquiring anisotropic PP wave and PS waveseismic records, elevation parameters, anisotropic parameters and inclination angle information under complex surface conditions; constructing a P-wave forward wave field at a complex surface seismicsource corresponding to PP waves and PS waves of each shot; based on the elevation parameters and the inclination angle information, directly synthesizing PP waves of each shot and the PS wave seismicrecords after polarity correction into a local plane wave on the complex ground surface; acquiring complex earth surface reverse continuation wave fields of corresponding beam center points of the PPwaves and the PS waves of each shot; respectively acquiring pre-stack depth migration profiles of anisotropic PP waves and PS waves of each shot; and superposing all single-shot PP wave and PS wave migration profiles to obtain