The invention relates to an adhesive special for solvent-based ancient ink and a preparation method thereof, and belongs to an adhesive for protecting and restoring ancient ink cultural relics. The adhesive comprises the following components by weight percentage: 8 to 11 percent of gelatin, 25 to 30 percent of water, 45 to 50 percent of butyl acetate, 5 to 7 percent of acrylonitrile, 5 to 7 percent of butyl acrylate, 0.2 to 0.4 percent of zinc oxide nano-powder (treated), 3 to 5 percent of emulsifier (span-80), and 0.1 to 0.3 percent of initiator (ammonium persulfate or potassium persulfate). The adhesive is a repair adhesive special for the ancient ink, which is solvent-based, has good compatibility with a body material of the ancient ink, strong affinity, and no damage phenomena such as swelling, dissolution and the like, and has the characteristics of higher adhesive strength, aging resistance, mildew proofing and antibacterium and the like.