Abstract: In July and November of the year 2010,4 sampling sites were choosen,namely Wulingkeng (with an elevation of 900 m),Wanlilin (with an elevation of 1 100 m),Liyang (with an elevation of 1 300 m) and Baishanzu Station (with an elevation of 1 500 m),which are located at different altitudes, aiming to trap small mammals for studying the vertical variation of their communities. A total of 101 individuals of small mammals were captured,belonging to 2 orders,3 families,10 species. The results showed that capture rates and biomass at 4 altitudes had highly significant differences (P < 0.01). The dominant species,Niviventer confucianus,had the highest captured rate and a great percentage of the biomass,followed by Niviventer fulvescens. Similar to previous studies,both diversity and evenness of small mammals at middle altitudes (1 100 m~1 300 m) were higher than those at low and high altitudes. On the contrary, captured rate and biomass of small mammals at middle altitudes (1 100 m~1 300 m) were both lower than those at low altitudes and high altitudes. It was indicated that the comprehensive effect of habitat types at different altitudes and human disturbances in habitats might be the cause of this result.