The invention discloses a traditional Chinese medicine preparation for lowering blood sugar, which is prepared from the following Chinese medicinal materials in parts by weight: 5-15 parts of Codonopsis pilosula, 5-15 parts of dodder seed, 5-15 parts of epimedium, 5-15 parts of Schisandra chinensis, and 5 parts of licorice ~15 parts, dried ginger 5~15 parts, hibiscus leaves 5~15 parts, sarsaparilla 5~15 parts, cotyledon leaves 5~15 parts, Chinese rose leaves 5~15 parts, geranium seeds 5~15 parts, wolfberry 5~15 parts of bone leaves, 5~15 parts of silver dew plum leaves, 5~15 parts of sky umbrellas, 5~15 parts of hibiscus flowers, 5~15 parts of pine bark, 5~15 parts of stone see wear, 5~15 parts of poplar flowers , 5~15 parts of banana flower, 5~15 parts of pomelo root, 5~15 parts of tiger thorn root, 5~15 parts of gardenia root, 5~15 parts of chicken yellow, 5~15 parts of coriander, 5~15 parts of rush 15 servings. The traditional Chinese medicine composition of the invention has obvious effects on lowering the blood sugar level of diabetic patients, improving the patient's symptoms and alleviating the pain of the patients, and the raw materials used are all cheap and easy to obtain.