Two Asian pit-vipers (QY224 and QY225, stored at Chengdu Institute of Biology) were collected in Zoige, Sichuan Province in June, 2015. They were identified as Gloydius cognatus by evidence from morphology comparison and haplotype network based on mitochondrial genes ND4, which is the first discovery of G. cognatus in Sichuan. Its naming history and taxonomic position were discussed briefly.