The Yulong Mountain Dragon, Diploderma yulongense (Manthey, Denzer, Hou, and Wang, 2012) was first described based on seven historical specimens from Lijiang in northwest Yunnan, PR China in 2012, and little is known regarding its natural history and distribution range. During herpetological surveys in 2019, two specimens of Diploderma (one male 2019ML0037, one female 2019ML0038) were collected in Xiamaidi Village, Muli County, Sichuan Province, China. Both morphological comparison and molecular phylogenetic relationships indicate that these two specimens are D. yulongense, which is a new record in Sichuan Province. This new discovery extends the geographical distribution of D. yulongense more than 100km northeastward.