受多种因素的综合影响，近年来山区各种地质灾害频频发生，给人们的生产和生活带来巨大的损失，不得不引起人们的普遍关注。陕西省南部地区位于秦巴山地，是我国地质灾害非常严重的地区，山区滑坡灾害尤为突出。 本文以陕西勉县为研究范围，以山区滑坡为重点研究对象，在大量现场调查工作的基础上，首先对该区的滑坡灾害进行了分类，分析了滑坡灾害的分布与发育规律，探索了滑坡发生的地质环境条件及其主要影响因素。在滑坡影响因素分析的基础上，筛选滑坡危险性评价指标，建立了滑坡危险性评价指标体系。选取地层岩性、地质构造、地貌、坡度、高程、降雨量、地震动峰值加速度、土地利用类型以及人类工程活动等做为滑坡灾害发育的主要影响指标。 在上述工作基础上，以GIS为基础依托，采用模糊综合评判为量化评价模型，借助层次分析法确定了评价指标的权重，对研究区的滑坡灾害进行了危险性综合评价，实现了滑坡灾害的危险性区划。论文最终按照危险性程度将研究区的滑坡划分为4个等级，即滑坡灾害极低危险性区、滑坡灾害低危险性区、滑坡灾害中危险性区和滑坡灾害高危险性区。其中滑坡灾害高危险性区主要分布在南北丘陵区、西北部低中山地区；滑坡灾害中危险性区主要分布在勉县南北边界的低中山地区以及中部低中山区，与滑坡灾害高易发区相邻；滑坡灾害低危险性区主要分布在北部低中山区，与中易发区交界处；滑坡灾害极低危险性区主要分布在盆地区，该区域主要是人类居住区，地势平坦，不易发生滑坡灾害。

Due to a variety of factors, geological disasters occurred frequently in recent years, giving people a huge loss of life, had cause for concern. Shaanxi is the southern region of geological disasters are more serious, especially landslide hazards. In this paper, the research scope of Mianxian County, Shaanxi, landslides in mountainous areas to focus the study, on the basis of extensive field investigation work, first of landslide disaster in this region have been classified,and analysis of the distribution and development regularity of landslide hazards, explore the causes of landslide geological environmental conditions and the main influence factors.In the analysis of influencing factors on the basis of landslide, screening indexes of landslide hazard evaluation,then creating a landslide hazard evaluation index system, select geological lithology, geological structure, topography, slope, elevation, rainfall, peak ground acceleration, land use types and human engineering activities as a major development impact indicators landslide hazard. In the work, based on the use of gis, fuzzy comprehensive evaluation of quantitative evaluation model, using AHP to determine the rights of the evaluation index weight of landslide hazards in the study area were risk evaluation, to achieve a landslide disaster hazard zonation. Final papers will be in accordance with the degree of risk of landslides in the study area is divided into four levels, namely that is a very low risk of landslide disaster area, the low risk of landslide hazard areas, landslide hazard areas and the risk of landslide hazards in high-risk areas. High risk of landslide disaster which mainly distributed in the hilly area of north-south, northwest of low Zhongshan region; landslide disaster risk areas are mainly located in the north-south border Mianxian low Zhongshan region, as well as low in the middle of the mountains, and landslide disaster-prone areas with high o; low risk of landslide disaster area mainly in the northern low in the mountains, in the junction-prone areas; very low risk of landslide disaster area is mainly basin area, the region is mainly inhabited areas, flat, easy landslide disasters.