中文摘要：

以广东东莞市土地为研究对象，采用“压力-状态-响应”（PSR）模型，共选取19个指标建立土地生态安全评价指标体系，运用Matlab软件编程并建立解释结构模型（ISM），利用所建立的模型对东莞市土地资源生态安全评价因素进行分析。模型分析得出：东莞市的土地生态安全评价因素被分成七级递阶结构，最低一级的因素是土地利用率，通过土地利用率的情况，影响经济密度，进而影响本地区的人口增长率和人口密度等因素，最终影响土地生态安全。最高一级是自然保护区的比重。这是由东莞市的现代化工业城市的特点所决定的。其中中间几级构成循环回路。土地生态安全评价因素之间的这种结构模型给政府以及决策部门为保持本地区土地生态安全提供了决策参考。

英文摘要：

Combined with land conditions in Dongguan city of Guangdong province, an evaluation index system of land ecological security was established using the ＂ press-status-response＂ （PSR） model. 19 indexes are included. With this index system, an Interpretative Structural Model of land ecological security was established using Matlab software. This model was applied to ecological security evaluation of land re- sources in this city. The results reveal that evaluation factors of land ecological security are divided into seven hierarchical structures. The low- est level factor is the ratio of land utilization. From the land utilization, economic density and then the population growth rate and population density in this region are influenced. Ultimately the land ecological security is affected. The highest level is the proportion of nature reserves which is attributed to special features that this city is a modern industrial City. Among a few levels, some factors constitute a circulation loop. This structural model provides references of land ecological security for governments and the decision-making departments.