During the survey on the amphibian and reptile diversity in Henan Province in late August 2018, eleven individuals of skinks (Scincidae) were captured at the suburb of Tongbai Mountains, Nanyang City. Through morphological analyzing, all of them were identified as Liu’s skink, Plestiodon liui, which is the first record in Henan Province, and the first record in the north region of Yangtze River. Moreover, the characteristics of sexual dimorphisms of the Liu’s skink were clarified. The DNA barcoding COI gene sequences (658 bp) were used to evaluate the phylogenetic placement of P. liui. Examination of phylogenetic analyses recovers the monophyly of the P. capito group, and suggests that P. liui is the sister taxon to P. capito plus P. tunganus.