▎ 摘　　要

NOVELTY - Gas separation membrane comprises a porous support, a first layer including one dimensional carbon body on the porous support, and a second layer including a metal-organic framework on the first layer. USE - The gas separation membrane is useful for separating high-purity gases e.g. hydrogen (claimed). ADVANTAGE - The method is economical; and produce high-purity hydrogen; has excellent gas permeability and selectivity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for (1) manufacturing a gas separation membrane, comprising coating one-dimensional carbon body on the porous support, preparing a reaction solution including a metal precursor and heterocyclic compound and impregnating the one-dimensional carbon body-coated porous support in the reaction solution to coat the metal-organic framework; and (2) method of separating hydrogen, comprising separation hydrogen from the gas mixture using the gas separation membrane.