Based on the connotation of ecological carrying capacity, from the standpoint of realizing the coordinated development of economics and environment, the comprehensive evaluation index system for mountainous valley areas in Beijing was built from the aspects of ecosystem elasticity level,bearing capacity and pressure index of environment and resources. And the evaluation mode was constructed using comprehensive evaluation method. The ecosystem elasticity index of Jiuyuan valley region in 2010 was stable (71.2), The index of carrying capacity of resource and environment reached medium level (59.6). The index of carrying capacity pressure was at relatively high level (72.2). The carrying capacity of the area was 67.7, belonging to the secondary level. Furthermore, corresponding advices for promoting sustainable and healthy development of Jiuyuan valley region were put forward.%在北京山区沟域生态承载力内涵的基础上,从实现沟域经济社会可持续发展及经济与环境协调发展的角度,从生态弹性指数、资源环境承载指数、资源环境压力度等方面,构建了北京山区沟域生态承载力评价指标体系,并应用综合评价法构建了评价模型.2010年韭园沟域生态弹性指数得分71.2,属较稳定水平；资源与环境承载力得分为59.6,属中等水平；资源环境承压度得分72.2,处于较高压水平;生态承载力得分为67.7,属二级水平.依据评价结果,提出了推动韭园沟域可持续健康发展的对策建议.
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