Abstract: In order to more clearly understand the relevance of the forestry land distribution and the terrain factors, which can provide basic information to reasonable utilization of forest resources in mountainous areas and the ecological environment protection. The author had a registration overlay analysis of high resolution aerial, satellite photograph and 1:10000 topographic map by making use of geostatistics of ArcGIS 9.3, then considering the fact that different photo color referred to different types of vegetation landscape, acquired factor data in small classes of woodland with visual interpretation in small classes of woodland and field research, and next discussed the correlation between forestry land and topography factors. It was shown that: in areas of low elevation and low slope where human beings were highly involved, all sorts of forestry land were distributed, which meant evolution and slope had little effect on forestry land, and that in those areas where human activities were lessened little by little with high elevation and high slope, kinds of forestry land decreased accordingly. Furthermore, the irrigated paddy fields were the main types of forestry land on the elevation of 1200 m and slope above 35°. The differences of forestry land distribution were significant in the southwest-northeast and east-west aspects, while the other aspects are relatively.