Abstract: Eotitanosuchia is a primitive suborder of Therapsida. Carroll (1989) included three families, Biannosuchidae, Eotitanosuchidae and Phthinosuchidae in this suborder, while Sigogneau—Russell (1989) assigned only one family Eotitanosuchidae including two genera and two species. Eotitanosuchus olsoni Chudinov, 1960 and Ivantosaurus ensifer Chudinov, 1983. The two genera come from the Upper Kazanian, Esheevo Locality, Ocher Province, Russia. A recently discovered incomplete skull and mandibles from Upper Permian Xidagou Fonnaüon, Dashankou Locality, Gansu are described here as the first eotitanosuchian outside Russia. Associated with this taxon are numerous therapsids, labyrinthodont amphibians and captorhinomorphs, of which a bolosaurid Belebey vegrandis, two dinocephalians Sinophoneous yumenensis and Stenocybus acidentatus have been reported (Li and Cheng, 1995; Cheng and Ji, 1996; Cheng and Li, 1997). The discovery of eotitanosuchian in China further proves close relationships between the mshankou Fauna and the Zone Il of Russia, and provides new material for discussing the phylogeny of early therapsids.