Radix swinhoei (H. Adams) is a freshwater snail commonly found in shallow regions of Taihu Lake. These snails often are observed associating with aquatic plants and can graze some macrophytes. This research estimated consumption rates of Radix swinhoei on three young submerged plants (Vallisneria spiralis, Hydrilla verticillata and Potamogeton malaianus) in laboratory experiments. The snail consumed V. spiralis at the highest rate (13.63 mg•g^－１•d^－１), P.malaianus at a lower rate (9.66 mg•g^－１•d^－１), and H. verticillata at the lowest rate (0.31 mg•g^－１•d^－１). The consumption rates on V. spiralis varied significantly with snail size (p<0.05), ranging from 13.63 mg•g^－１•d^－１ for large-sized snails to 143.42 mg•g^－１•d^－１ for small-sized ones, and consumption rates generally had a negative correlation to snail size. Radix swinhoei had preferred V. spiralis over H. verticillata and P. malaianus, and the selectivity increased with snail size. The selectivity mechanism of Radix swinhoei on aquatic plants is discussed.