Livelihood security, the most basic requirement for sustainable development influences regional development and poverty alleviation significantly. In order to measure livelihood security in the Liupan Mountains, an assessment model and a corresponding index system were constructed on the basis of DPSIR model. Then spatial patterns and influencing factors of livelihood security were revealed,as well as the characteristics of its revolution. The results could be shown as follows:(1)In 2003,2008 and 2013,more than 65% counties were"unsafe"and"less safe",which indicated the livelihood security level clearly low overall in Liupan Mountains. The primary livelihood security states were"less safe","unsafe"and"less safe"respectively in the three years.(2)The high value clusters were concentrated obviously, showing a stable distribution of hot areas in southeastern and northwestern Liupan Mountains. Meanwhile the distribution of low value clusters changed obviously and basically located in western Qinghai,central and southern Liupan mountains,undergoing the process of expansion to reduction. ( 3 )Variation coefficients of livelihood security presented high-to-low alternative distribution patterns from northeast to southwest. There were 6 districts,Jingtai County,Huining County,Anding District,Huachi Country and Kontong District,improving significantly in livelihood security. However,the other 13 districts,such as Huangyuan County,Jingyuan County,Wushan County,Gangu County and Qinan Country,declined evidently.%生计安全是可持续发展最基本的需求,对于区域发展、削减贫困具有重要意义.本文以六盘山集中连片特困区为例,基于DPSIR模型建立了生计系统安全的DPSIR评估模型,构建了测度六盘山片区69县(区)生计安全水平指标体系,进而揭示生计安全空间分异格局及其影响因素,总结了生计安全演变的特征.结果显示:(1)2003年、2008年和2013年三个研究期,65%以上的县域生计安全为"不安全"和"较不安全","较安全"和"安全"状态的县域数量较少,六盘山区生计安全总体水平不高;3个时段内主要生计安全状态分别为"较不安全"、"不安全"、"较不安全".(2)六盘山生计安全的高值簇集聚明显.热点区域来看相对稳定,集中在六盘山区的东南部、西北部;低值聚簇空间格局变化较大,经历了扩大到缩减的过程,相对集中片区东南部和西北部.(3)生计安全的变异系数自东北向西南呈现高至低相间分布格局.景泰县、会宁县、安定区、华池县、崆峒区等6个县区是生计安全明显提高的县域;湟源县、靖远县、武山县、甘谷县、秦安县等13个县区生计安全明显下降.
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