Undulating surface Q offset seismic imaging method and device and terminal equipment

The invention discloses an undulating surface Q migration seismic imaging method and device and terminal equipment, and the method comprises the steps: building an equivalent speed model on a reference surface and an equivalent speed model under the reference surface through employing an undulating surface direct pre-stack time migration method based on the pre-stack seismic data of a target work area and a preset reference surface; establishing a near-surface equivalent Q value model by adopting a near-surface Q value scanning method; establishing an equivalent Q value model below the reference surface by adopting a local window constant Q scanning analysis method, and recording the equivalent Q value model as a mid-deep layer equivalent Q value model; and performing undulating surface Q migration imaging on the target work area based on the equivalent velocity model on the reference plane, the equivalent velocity model under the reference plane, the near-surface equivalent Q value model and the mid-deep lay