The invention discloses garter snake medical wine and a preparation method thereof, and belongs to the technical field of snake wine processing. The garter snake medical wine is mainly prepared from garter snakes, tuber fleeceflower roots, turmeric rhizome, sappan caesalpinia wood, mongolian milkvetch roots, dwarf lilyturf roots, English walnut seeds, tendrilleaf fritillary bulb, wild mint herb, fixweed transymustard seeds, eucommia bark, dasystyle honeysuckle immature flowers, trilobedleaf kudzuvine roots, Himalayan teasel roots, Chinese angelica roots, indigo-colored woad leaves, veitch peony roots, yanhusuo rhizome, nut-vomitive poisonnut seeds, subshrubby peony roots-barks, common papermulberry fruits, Japanese fleecceflower rhizome, barbary wolfberry fruits, fresh ginger, baron's drynaria rhizome, rock candy and Baijiu. The garter snake medical wine has the functions of clearing and activating channels and collaterals, moistening lung and relieving cough, remarkable effects on treatment of rheumatic arthritis, low back and leg pain, cough and excessive phlegm and has the advantages of simple preparation method, low cost, convenience in taking and no toxic and side effects.