The invention relates to a sausage and a preparation method thereof. The sausage is obtained by employing the preparation method with the following steps: (1) preparing raw materials with the following weight parts: 5-10 parts of tea leaves, 3-5 parts of shaddock peel and 3-5 parts of lycium barbarum, mixing, adding water and boiling together, and filtering to obtain a mixed extraction solution; (2) cleaning fresh pork, cutting into meat granules, mixing the meat granules and the mixed extraction solution with a weight ratio of 20:1; (3) adding spices and preserving, wherein the spices comprise zanthoxylum bungeanum, table salt, illicium verum, Xinhui pericarpium citri reticulatae powder and sesame; and (4) uniformly stirring preserved meat granules, filling sausage casings with the granules, drying at the environment temperature of 0 DEG C-15 DEG C in air, so as to obtain the finished product. The sausage provided by the invention does not need roast smoking, has unique flavor, is delicious in meat quality, is substantially reduced in cancerogenic substance content, and has the health-care efficacy of resisting oxidation, resisting ageing, clearing liver fire, improving vision, suppressing cough, resolving phlegm, strengthening intestines, increasing appetite and the like.