Abstract: One female specimen of genus Sorex was collected in Shanxi Luya Mountain National Nature Reserve on 4th September,2010,and was identified as Sorex tundrensis through molecular method.It was a new record for this mammal species in Shanxi Province.The site was the southernmost distribution spot in the world,and the Yellow River was a barrier to its southward spread.The specimen was deposited in the animal specimen room of Sichuan Academy of Forestry.