Acid gas adsorbing material

The invention relates to a gas adsorbing material, in particular to an acid gas adsorbing material. The acid gas adsorbing material comprises a flaky substrate of a porous structure, an active carbon fiber is adopted as the substrate, the substrate is dipped in an adsorbent composition which comprises polyamine and a coexisting polymer chemically bonded with polyamine, and the coexisting polymer is chemically boned with polyamine and the active carbon fiber simultaneously. The adsorbing material has the high durability and the good adsorbing capacity to acid gas.