Liaoxisaurus is a genus of simodeosaurid choristodere, a type of crocodile-like aquatic reptile. It is known from a partial specimen found in Aptian-age Lower Cretaceous rocks of the Jiufotang Formation, Chaoyang, Liaoning, China. Liaoxisaurus was named in 2005 by Gao Chunling and colleagues. The type species is L. chaoyangensis.