Landscape ecological security assessment aims to make a comprehensive evaluation of regional landscape ecological security through the construction of regional ecological security evaluation indicator system. According to the theory of landscape ecology, spatial principal component analysis (SPCA) and GIS techniques, we obtained the distribution of landscape ecological security pattern of Ganzhou District, Gansu province, China. We obtained the ecological sources, corridors, and nodes according to the minimum cumulative resistance (MCR) model to optimize the structure and function of ecological function network. The following results were found: the comprehensive landscape ecological security situation of the research area was on the average. The spatial distribution pattern of landscape ecological security level indicated that the low level of safety were mainly distributed in the Gobi and desert areas in the north, accounting for 19.9% of the study area, while the high safety level was mainly distributed in the northwest and southeast of the Heihe River basin, accounting for 24.8% of the study area. With points, lines, and surfaces being interlaced, a regional ecological network was constructed, which was consisted of six ecological corridors, 14 ecological nodes, a large ecological source area and a plurality of small source areas, and could effectively improve landscape ecological security level of the study area.

景观生态安全评价旨在通过构建区域生态安全评价指标体系，对区域景观生态安全进行综合评价。根据景观生态学理论，空间主成分分析（SPCA）和GIS技术，获得了甘肃省甘州区景观生态安全格局的分布。根据最小累积抗性（MCR）模型获得了生态源，廊道和节点，优化了生态功能网络的结构和功能。结果表明：研究区综合景观生态安全状况平均。景观生态安全水平的空间分布格局表明，低安全水平主要分布在北部的戈壁和沙漠地区，占研究面积的19.9％，高安全水平主要分布在西北和北部。黑河流域东南部，占研究面积的24.8％。通过点，线，面的交错，构建了一个区域生态网络，该网络由六个生态走廊，14个生态节点，一个较大的生态源区和多个较小的源区组成，可以有效提高景观生态安全水平研究区域。高安全等级主要分布在黑河流域的西北和东南部，占研究面积的24.8％。通过点，线，面的交错，构建了一个区域生态网络，该网络由六个生态走廊，14个生态节点，一个较大的生态源区和多个较小的源区组成，可以有效提高景观生态安全水平研究区域。高安全等级主要分布在黑河流域的西北和东南部，占研究面积的24.8％。通过点，线，面的交错，构建了一个区域生态网络，该网络由六个生态走廊，14个生态节点，一个较大的生态源区和多个较小的源区组成，可以有效提高景观生态安全水平研究区域。