Agro-pastoral ecotone of North China is the ecosystem transition zone and ecological security barrier tape in China. Ecosystem in this zone is vulnerable, which has obvious instability and sensitivity. In this paper, authors analyzed the ecological characteristics of agro-pastoral ecotone, and constructed an eco-evaluation system reflecting regional ecological productivity, functional support force, limiting factors and co-factors forcing. By using multi-source remote sensing data, land ecological data, environmental data, weather data et al, the authors analyzed the ecological quality status and trends of this zone in 2000-2010. According to the result of Linear regression and K-means cluster analysis, study showed that the ecosystem quality of the region was mainly in “general”, the trend of ecosystem appeared “steady changed for the better”, the area of “good” and “general”increased in recent decade. The ecosystem fuction of 16 counties and ecological productivity of 18 counties were improved in recent decade. The moisture conditions and environmental load were major constraints and stress factors in agro-pastoral ecotone and there is significant ecological risk in local areas.%北方农牧交错带是中国生态环境的一条过渡带，也是中国重要的生态安全屏障带，生态环境脆弱，具有明显的不稳定性和敏感性。以中国北方农牧交错带为研究对象，构建了反映区域生态生产力、功能支撑力、制约因子和胁迫因子的农牧交错带生态环境状况评估体系，利用多源遥感数据、土地生态数据、环境数据、气象数据等多源信息综合评估2000-2010年间该地区生态质量状况及变化趋势。根据Linear Regression和K-means cluster分析表明，该区域生态环境质量以“一般”为主，10年间生态环境质量呈现整体“稳中变好”的特征，“良”和“一般”呈增加趋势，16个县生态功能改善，18个县生态生产力呈恢复状态，16个县土地退化程度降低。水分条件和环境负荷是影响农牧交错带的主要限制和胁迫因子，局部地区存在显著生态风险。
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