A large number of enantionithine birds are discovered from the Early Cretaceous Jiufutang Formation in western Liaoning, China. They are all small-sized birds with a few small tecth. The enantirnithine bird from the Jiufutang Formation in the Shangheshou area, Chaoyang, Liaoning Province reported in this paper is the largest individual known in all enantiornithine birds of the Early Cretaceous, Hower, its teeth posses a feature of pseudoheterodont. Some different development stages of the new teeth substiute the earlier stages and the stages of development are preserved in this speciment. T