The morphology and development of pharyngeal dentition were observed for Myxocyprinus asiaticus, Gobiocypris rarus, Psilorhynchus homaloptere, Gyrinocheilus aymonieri, Leptarichthys fimbriata and Cobitis sp. which represent families of Catostomidae, Cyprinidae, Psilorhynchidae, Gyrinocheilidae, Homalopteridae and Cobitidae. Results indicate that, in the Cypriniformes, except Gyrinocheilidae which does not bear pharyngeal teeth, the development process of pharyngeal dentition can be divided into 2 patterns, one of them occurs in Families Catostomidae, Homalopteridae and Cobitidae and the other only restricted to family Cyprinidae. The first pattern has such a process; before the tooth position CeO, there is only one tooth position appearing at An1, all the other tooth positions are distributed to the positions after the CeO, from Pol to Pon. The number of the tooth, positions are not limited. The teeth can be distributed to the end of the pharyngeal bones. In the second pattern, after the tooth position CeO, there is only one tooth position Pol. All the other tooth positions are distributed before the CeO, and the numbers of the tooth positions are limited to 7.