The alterations of oral apparatus morphology of Rana chensinensis tadpole were observed using both electron microscopy and light microscopy.The results showed that jaw sheaths appeared firstly at embryo stage,followed by the formation of marginal papillae and tooth rows.However,the tooth rows disappeared,followed by the lost of jaw sheaths and marginal papillae during metamorphic climax stage (G41-G42).Compared to the other anuran larvae,morphological structure of oral cavity was related with the feeding behaviors and food types in Chinese Wood Frog tadpole.Finally,the feeding mode and food transport in the tadpoles of R.chensinensis were discussed.