The structural development of stomach was observed in Bufo raddei tadpoles with morphological methods. The results showed that at the stage 24 of Bufo raddei tadpole development, the digestive tract differentiated into simple tubular structure without a distinguished stomach, the wall of stomach was composed of an inner layer of mucosal epithelial cells and an outer layer of squamous epithelium cell. While at stage 26, the stomach was appeared as a fatter and shortter tube compared to other parts of the digestive tract. The stomach wall kept the two layer structure and the mucosal epithelial cells became highly columnar in shape and few goblet-like cells among the epithelial cells. At stage 36, the stomach was obviously swollen. The stomach developed into the general structures with four layers of tissue compounds. Goblet cells appeared in a large number. The free surface of mucosal epithelial cells covered with slender microvilli interwoven into the mesh. At stage 42, the stomach was became to a C-like shape, typical four-layer structure of the stomach was formed