Pachyserica yinhengi is a species of beetle of the family Scarabaeidae. It is found in China (Xizang).
Adults reach a length of about 10 mm. They have a dark brown, oval and strongly convex body. The dorsal surface has a greenish shine and the elytra are slightly lighter, with dark spots. The antennae are yellow. The dorsal surface has a weak iridescent shine, with fine, partly patchily distributed, or dense, short, white or yellowish setae. There are also long fine erect, yellow setae on the head, pronotum and anterior elytra.
The species is named after its collector, Han Yinheng.