Lithobius (Ezembius) laevidentata sp. n. (Lithobiomorpha: Lithobiidae), discovered from Barkol Kazak Autonomous County, Hami City, Xinjiang Uygur Autonomous Region, Northwest region of China, is described. Morphologically it resembles L. (E.) bilineatus Pei, Ma, Zhu & Gai, 2014. from Guangxi Zhuang Autonomous Region, China, but can be readily distinguished from the latter by 8–10 ocelli arranged in 3 irregular rows, Tömösváry’s organ subequal in size to the adjoining ocelli, female gonopods with 3–4 spurs, and the terminal claw of the third article of female gonopods simple. A key to Chinese Lithobius (Ezembius) species is presented.