Abstract: Specimens were collected in four major plateau wetlands in Lashihai Nature Reserve in August and October 2001,and October 1999.For determining the status of fishes fauna,literature was referenced,and fishermen were interviewed in the Participated Rural Augmentation(PRA).A combination of the results of species-identification of 4550 specimen and PRA,as well as checking historical records resulted in:there are 25 fish species,belonging to 21 genera,10 families and 5 orders;of 25 species,18 were introduced,7 were indigenous,and 3 species were highly endangered or even extinct.Triplophysa (Triplophysa) venusta was first recorded in this area.The fauna mainly consists of introduced species,and the indigenous are disappearing.