Flexible metal-organic frameworks(MOFs)have both highly ordered coordination network and cooperative structural transformability. Their strutures can respond to temperature,pressure,guest adsorption/desorption,and other external stimuli. In recent years,flexible MOFs has showed great potential in gas adsorption,gas separation and sensing. However,most reports on flexible MOFs are limited to the mechanism study on structural transformation,while their applications on chemical industry has been insufficiently investigated. In this review,emphasis is given on the recent progress in the gas adsorption and separation on flexible MOFs. And the relationships between adsorption/separation properties and framework features are detailed analyzed. In addition to the experimental aspect,theoretical investigations of adsorption equilibrium and diffusion dynamicsvia molecular simulations are also briefly reviewed. Therefore,more efforts should be made to design and synthesis new flexible MOFs with highly adsorption selectivity and diffusion properties for green and efficient gas separation process.%柔性金属有机骨架材料（MOFs）具有高度有序的网络结构与可变形的骨架，其骨架结构会对外界的温度、压力及客体分子的刺激产生独特的结构响应。近几年来，柔性 MOFs 在气体吸附、气体分离、传感等领域显示出巨大的应用潜力。截至目前，研究者们对柔性 MOFs 的研究仅局限于对其结构形变的机理解释，而缺乏对柔性 MOFs应用于相关化工过程的性能研究。本文着重对近年来柔性 MOFs 在气体吸附分离领域的研究进展进行了综述，并详细地分析了柔性 MOFs 结构与其气体吸附分离性能之间的构效关系。通过分子模拟结合实验，讨论了柔性 MOFs 结构对气体分子的平衡吸附与动力学扩散的影响。分析表明，设计合成具有良好吸附选择性与扩散性能的柔性MOFs是其应用于绿色、高效气体分离过程的重要发展方向。
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