Liobagrus chenghaiensis is a species of catfish in the family Amblycipitidae (the torrent catfishes) endemic to China, where it is only known from lake Chenghai in the province of Yunnan.

[1] L. chenghaiensis is distinguished from all other species of Liobagrus with a serrated posterior margin of the pectoral-fin spine by possessing a free apex on the posterior margin of the adipose fin.

It is similar to L. marginatus in the presence of a subtruncate caudal fin, by which both are distinguished from all other Chinese congeners with a serrated posterior margin of the pectoral-fin spine.

These two species are distinguished by differences in the body depth and the distance between the pelvic-fin insertion and the vent.

[1] Data related to Liobagrus chenghaiensis at Wikispecies