In this study,we investigated the difference of habitat selection patterns among four ungulates,Takin(Budorcas taxicolor),Serow(Capricornis sumatraensis),Goral(Naemorhedus goral)and Tufted deer(Elaphodus cephalophus)living in Baishuijiang National Nature Reserve,Gansu Province.This investigation involved 3336 pieces of effective habitat selection data(vegetation,land form and distance from residential area).We used Vanderloge and Scavia indexes to analyze these data in order to conclude a habitat selection preference of these four species.Our results indicate that small species prefer low-altitude habitat.In terms of topography,Goral prefers ridge,Tufed deer prefers valley,Serow prefers slopes and valley,while the selection pattern of Takin is at random.Except Tufted deer,all the rest three of these four species avoid using habitat less than 5 km away from their residential areas.Habitat selection patterns of these four species reflected the differentiation of their niches.