Rainfall is the main dynamic factors of soil erosion in mountainous areas in China,the rainfall erosion force reflects the potential ability of rainfall on soil erosion,analysis and study on the distribution variation trend of rainfall erosivity plays an important role in monitoring,evaluation,prevention and treatment of soil erosion in southern Shaanxi.Using daily rainfall data from 7 weather stations of representative regions in recent 60 years of including Hanzhong,Lveyang,Foping,Shangzhou,Zhen’an,Ankang and Shiquan,the rainfall erosion force of each platform were computed and statistical characteristic of rainfall erosion force were analyzed. The results showed that average rainfall erosion force belongs to medium variation,southern Shaanxi rainfall erosion force gradually reduces from west to east.%降雨是我国陕南山区土壤侵蚀的主要动力因素，降雨侵蚀力反映了降雨对土壤侵蚀的潜在能力，分析研究降雨侵蚀力的分布变化趋势对我国陕南地区土壤侵蚀的监测、评估、预防和治理等都具有重要的意义。利用汉中、略阳、佛坪、商州、镇安、安康、石泉等7个具有代表性地区的气象站点近60年的日降雨量数据，计算各站台的降雨侵蚀力，分析降雨侵蚀力的统计特征。研究结果表明，陕南地区多年平均降雨侵蚀力属于中等变异，陕南地区降雨侵蚀力从西向东逐渐减少。
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