Opisthotropis latouchii, also known commonly as the Sichuan mountain keelback, is a species of snake in the subfamily Natricinae of the family Colubridae.

[2] O. latouchii is named after French-born Irish naturalist John David Digues La Touche, who worked in China as a customs inspector for many years.

[1][2] The preferred natural habitat of O. latouchii is freshwater streams, but it is also found in rice paddies and irrigation ditches.

[2] O. latouchii preys upon aquatic worms,[1] earthworms, freshwater shrimp, fishes, tadpoles, and frogs.

[1][2] In Fujian adult females lay eggs in August.