Inland foraminifer fossils are considered as one of good indicators of marine facies. However, the discovery of Quaternary foraminiferal fossil assemblages in the inland of western China and study of their living environment indicate that the salinized lake facies foraminifers living in salinized lakes that had no connection in space or time with sea water did exist. The new knowledge of the facies indicating significance of foraminifers is the key to the understanding of the Cenozoic paleography of China.