Seismic imaging method and device for reverse time migration imaging noise suppression

The invention belongs to the technical field of seismic exploration, and particularly relates to a seismic imaging method and device for reverse time migration imaging noise suppression. The method comprises the following steps: (1) taking a seismic wavelet as a boundary value condition, adopting a one-way approximate wave field recursive vector, and realizing recursion of a forward transmission wave field along a depth direction to obtain a transmission wave field in the depth direction; (2) outputting the transmission wave field in the depth direction along the time direction to obtain a transmission wave field snapshot propagating along the time forward direction; (3) utilizing a two-way wave equation to reversely deduce seismic data to obtain a reflected wave field snapshot which is reversely propagated along time; and (4) performing cross-correlation and superposition on the transmission wave field snapshots and the reflection wave field snapshots by using imaging conditions, and outputting a final imagi