The invention discloses a seismic data pre-stack reverse time migration imaging method, which belongs to the technical field of oil exploration and development. The seismic data pre-stack reverse time migration imaging method utilizes physical property parameters represented by a three-dimensional depth domain speed field, performs partitioning processing on a work area, determines grid scales of different areas, performs grid discrete processing, utilizes a GPU to share the massive computation of wave field extrapolation, utilizes the feature that reverse time migration and shot-domain migration are irrelevant and use a CPU to perform shot-domain coarse-grain parallelism, and effectively increases imaging precision and imaging efficiency of pre-stack reverse time migration.