A low-carbon economy calls for CO2 capture technologies.Membrane separations represent an energy efficient and environment-friendly process compared with distillations and solvent absorptions.Metal-organic frame works (MOFs),as a novel type of porous materials,are being generated at a rapid and growing pace,which provide more opportunities for high-efficiency CO2capture.In this review,we illustrate a conceptional framework from material design and membrane separation application for CO2 capture,and emphasize two importance themes,namely (i) design and modification of CO2 philic MOF materials that targets secondary building units,pore structure,topology and hybridization and (ii)construction of crack-free membranes through chemical epitaxy growth of active building blocks,interfacial assembly,ultrathin two-dimensional nanosheet assembly and mixed-matrix integration strategies,which would give rise to the most promising membrane performances for CO2 capture,and be expected to overcome the bottleneck of permeability-selectivity limitations.