In recent years, a large number of dinosaurs, dinosaur eggs, and companion species fossils have been discovered from the Upper Cretaceous of Ganzhou basin. Particularly abundant are the theropod dinosaurs, with the majority belonging to Oviraptorosauria (comprising up to seven genera and seven species). Only two medium- sized theropod dinosaurs, Qianzhousaurus sinensis and Asiatyrannusxui, have been found among the medium- sized to large theropods. Additionally, scattered theropod dinosaur teeth have also been found. Despite the numerous discoveries of theropod dinosaurs in the Ganzhou basin and the taxonomic studies conducted, research on the ecological composition of theropod dinosaurs in this region remains relatively limited. This study describes two newly discovered theropod teeth, one of medium size and the other large, from the Upper Cretaceous Guifeng Group in the Ganzhou basin. This research reveals that during the Campanian (Late Creataceous), two species of medium- sized and one species of large tyrannosaurids coexisted in the Ganzhou basin. This combination of the predators was different from the species combination of the medium- sized and large theropod dinosaurs in the Northern Hemisphere during the Campanian and Maastrichtian (Late Creataceous).