Abstract: Habitat selection of mainland serow (Capricornis sumatraensis) was studied in Tangjiahe Natural Reserve,Qingchuan County of Sichuan Province from March 1998 to February 1999.The results showed as follows:The main ecological factors notably influenced on habitat selection of mainland serow in spring were human disturbance,vegetation type,tree dispersion,tree density,slope,rock dispersion,tree size and slope position.The main ecological factors notably influenced on habitat selection of mainland serow in winter were human disturbance,vegetation type,slope position,canopy,water source,tree dispersion,tree density,tree size,shrub size,rock dispersion,slope aspect and animal dispersion.The separation of habitat selection of mainland serow in spring and winter showed mainly in the ecological factors,slope,elevation,tree size,tree dispersion,shrub dispersion,rock dispersion,vegetation type,slope position,canopy and water source.