Andixius trifurcus is a species of planthopper belonging to the family Cixiidae. It is endemic to Yunnan, China.
The females are larger than the males, having a body lengths of and , respectively. Both sexes have yellow-brown bodies and dark brown to black antennae. Their eyes are brown, translucent, and have a yellow ocelli. Unlike the similar-looking Andixius longispinus, they have larger brown markings on the wings and lack a tan spot.