The invention provides an elastic wave
gaussian beam pre-stack depth migration technology, which comprises the following steps of: 1) according to a selected
gaussian beam primary width, dividing a single slot
record into a series of stacked areas by a
gaussian window, wherein the center of each area is a beam center; 2) decomposing a multi-component seismic
record into different wave-formed local
plane wave components by utilizing local slant stack; 3) respectively test-firing the elastic dynamic gaussian beams from
hypocenter and beam centers and calculating the
travel time and amplitude information of each
gaussian beam in an effective range; 4) according to a PP wave and PS wave-deduced imaging formula, calculating an corresponding image value of each beam center by utilizing the
travel time, the amplitude information of the
gaussian beam, the polar information and surface local inclined information; and 5) repeating the calculations of steps 3) and 4), thereby acquiring an imaging result of the single slot, wherein the final migration result is the stack of all imaging results of the single slot. The method can be used for repeatedly imaging the multiple
waves, is higher in precision, has calculation efficiency and flexibility and is a multi-component seismic imaging method having higher application value.