Abstract: [Objective and Method]The indicator system of land ecological security were established based on the P-S-R model, the weight of the indicator was determined by the method of mean square deviation, and the land ecological security were calculated from 1995 to 2005. [Result]The result showed that the change of the land ecological security in Huocheng County had experienced three stages: decrease,increase and re-decrease. [Conclusion]On the basis of the analysis of the causes, the strategies of the construction of land ecological security in Huocheng County were brought forward.

摘要： [目的]基于P-S-R模型构建霍城县土地生态安全评价指标体系.[方法]采用均方差法确定了评价指标的权重,计算了研究区1995～2005年的土地生态安全度.[结果]在这一段时期霍城县土地生态安全度变化经历了下降-上升-再下降的三个阶段.1995～2001年为下降阶段,2001～2003年上升阶段,2003～2005年再下降阶段,表明该县生态环境基础差.[结论]在分析变化原因的基础上,结合实际情况提出霍城县土地生态安全建设的对策.