我国地质灾害肆虐，其中泥石流严重影响着山区人民正常的生产生活，由于威胁人群数量大，一旦暴发，将造成重大的人员伤亡和经济损失，制约着经济的发展，因此对泥石流的减灾防灾显得尤为重要，必须加强对泥石流灾害的研究、评估、减灾管理和预警预报，组织实施经济有效合理的防治工程。首要任务就是对灾害发生的可能性、危险性、危害范围和危害程度有一个基本的认识和评价，快速反映泥石流活动现状及发展趋势，为指导泥石流抗灾救灾与减灾决策提供重要的科学依据。 本文选取的宝鸡市陈仓区，地处关中西部暴雨中心，阴雨天较常见，地下水活动较强烈，容易发生泥石流等地质灾害，泥石流直接或间接地影响到了居民的正常生活和生产安全。论文叙述了陈仓区泥石流的特征及其分类，分析的陈仓区泥石流的形成条件，确立了泥石流危险性评价原则，构建了泥石流危险性评价体系。通过层次分析法和信息量法数学模型，计算各评价因子的权重值和信息量，结合ArcGIS运算得出泥石流危险性评价结果。通过对比分析两种评价结果，绘制了泥石流危险性综合评价图。 层次分析法计算结果得知，极高危险性地区主要分布于虢镇—阳平镇一带、香泉盆地和渭河断裂带内等地区；高危险性地区主要分布在凤阁岭镇—拓石镇—胡店镇—坪头镇的渭河两岸、贾村—千河镇黄土塬边、虢镇—阳平镇黄土塬边、千河东岸等；中危险性地区主要分布于新街镇—桥镇一带的黄土梁峁地区、金陵河地区；低危险性地区主要分布在坪头镇以南、凤阁岭镇以北通洞河流域、拓石镇以北常家沟等；极低危险性地区主要分布在秦岭山区、陇山地区等西部山区地带。 由信息量法计算结果可知，极高危险性地区主要分布于虢镇—阳平镇黄土塬边、香泉盆地东侧和坪头镇的渭河两岸等地区；高危险性地区主要分布在新街镇—桥镇一带的黄土梁峁地区、贾村—千河镇黄土塬边和香泉盆地等地区；中危险性地区主要分布于坪头镇、新街镇—县功镇的西部等地区；低危险性地区主要分布在凤阁岭镇以北通洞河流域、南秦岭北坡和陈仓区北部山区等；极低危险性地区主要分布在秦岭山区、陇山地区等。 综合考虑上述两种评价结果，绘制了宝鸡市陈仓区县域泥石流危险性综合评价图，获得了县域泥石流危险性综合评价结论。评价结果显示宝鸡市陈仓区泥石流危险性大的区域主要有：千河—阳平镇区、赤沙—香泉区、凤阁岭镇—坪头镇渭河谷地区和新街—桥镇区四个区域。论文最后根据研究区泥石流等地质灾害的具体情况，提出了防灾减灾综合措施。

The geological disasters are extremely serious in our country, and the debris flow has been seriously affecting the normal life and production of people in the mountainous areas. Once the debris flow breaks out, a large amount of people would be threatened and it would cause great casualties and economic losses, which restrict the development of the economy. So it is especially important to reduce and prevent the debris flow. It is necessary to intensify the study, evaluation, management of reducing disaster and prediction of the debris flow disaster. At the same time, the organiation and implement of the economic, effective and reasonable preventive projects are very significant. The primary task is to understand and evaluate the possibility, hazard, scope and degree of the debris flow disaster. Reflecting the current situation and development tendency of the debris flow rapidly can provide an important scientific ground for guiding the decision of the prevention, relief and reduction of the debris flow disaster. Chencang District in Baoji city is located in the west of the central Shaanxi plain which is the center of torrential rain. The rain days are common in this area and the activity of the underground water is intense，which cause the geological disasters as debris flow occur easily. The debris flow affects the safety of people’s normal life and production. In this paper, the characteristic and class of the debris flow in Chencang District were stated. And the evaluation principle of the debris flow danger was established, and then the danger evaluation system of the debris flow was set up by the analysis of the formation conditions. The analytic hierarchy process and information content method mathematical model were used to calculate the weight and information content of each evaluation factor respectively, and the evaluation result would be obtained combining the ArcGIS. Finally the comprehensive evaluation map was drawn through the comparative analysis of these two kinds of evaluation results. Form the result of analytic hierarchy process, we can know that the extremely high danger area majorly lies in the area of Guo Town—Yangping Town, Xiangquan Bason and Wei River fault zone. The high danger area lies in both shores of the Wei River of Fenggeling Town—Tuoshi Town—Huding Town—Pingtou Town, the loess tableland of Jiacun—Qianhe Town, the loess tableland of Guo Town—Yangping Town and the east side of Qian River. The medium danger area lies in the loess ridge and hills of XinjieTown—Qiao Town and the area of Jingling River. The low danger area lies in the south of Pingtou Town, Tongdong River basin in the north of Fengge Town and Jiachenggou in the north of Tuobei Town. The extremely low danger area majorly lies in the western mountains area of Qinling Mountains and Longshan mountains. The result of the information content method shows that the extremely high danger area majorly lies in the loess tableland of Guo Town—Yangping Town, the east of Yangquan bason and the Wei River sides of Pingtou town. The high danger area lies in the loess ridge and hills of Xinjie Town—Qiao Town, Jiancun—Qianhe Town and Qiangquan bason. The medium danger area lies in the west area of Pingtou Town, Xinjie Town—Xiangong Town. The low danger area lies in Tongdong River basin in the north of Fenggeling Town, the north slope of the south of Qingling and the north mountains area of Chencang District. The extremely low danger area lies in Qingling mountais and Longshan mountains area. Comprehensively considering these two kinds of evaluation results mentioned above the comprehensive evaluation map of the danger of debris flow in Chencang District was drawn and obtained the comprehensive evaluation results of debris flow danger in town scale. The results showed that the high danger area mainly contains of Qianhe—Yangping County District, Chisha—Xiangquan District, Wei River valley of Fenggeling Town—Pingtou Town ang Xinjie—Qiao Town District. And at finally, the comprehensive measures of the prevention and reduction of the disaster were put forward on the basis of the study of the specific situation of geological disaster as debris flow in the study area.