Method for preparing zinc-histidine self-assembly biomimetic complex activating reaction to convert carbon dioxide into bicarbonate ion, zinc-histidine self-assembly biomimetic complex by preparation method, and method for reducing carbon dioxide using zinc-histidine self-assembly biomimetic complex. The preparation includes: mixing L-histidine and p-toluene sulfonic acid in first organic solvent to form first mixed solution and recrystallizing first mixed solution with ethyl ether to prepare first mixed substance; mixing first mixed substance with azelaic acid in second organic solvent to form second mixed substance containing imidazole and amide groups; mixing second mixed substance with NaOH and HCl in third organic solvent to form third mixed solution and recrystallizing third mixed solution with ethyl ether to prepare third mixed substance having amphiphilic characteristic; and mixing third mixed substance with aqueous solution of zinc precursor and causing self-assembly to prepare zinc-containing self-assembly biomimetic complex.