Tracking ground moving targets with airborne radar cannot guarantee track quality and continuity due to high target density, high clutter, and low visibility. In order to solve this problem, all kinds of aided information are widely utilized in different ways. As to a kind of aided information given as geospatial map, this paper proposes a new aided knowledge fusion method. Via performing the road judgment and shadow judgment in geospatial point perspective, the new fusion method reduces the implementation complexity significantly. The simulation results prove that the new aided knowledge fusion method proposed by this paper can fuse the aided information effectively in ground moving targets tracking.