Relating traditional Chinese medicinal compositions, the invention specifically relates to a traditional Chinese medicine for treating constipation. The medicine comprises the following raw materials by weight: 1-3 parts of Chaydaia rubrinervis, 2-4 parts of rhizoma drynariae, 2-4 parts of melandrium album, 1-3 parts of Bauhinia championii, 5-7 parts of Amaranthus caudatus L., 4-6 parts of Artemisia anomala, 3-5 parts of angelica, 3-5 parts of kendir, 2-4 parts of white peony root, 3-5 parts of atractylodes, 4-8 parts of polished rice, 6-8 parts of prepared rehmannia root, and 5-7 parts of astragalus. With low recurrence rate, good curative effect, short treatment course, quick effect, no side-effect, and low cost, the traditional Chinese medicine of the invention can improve the internalimmune function in human body, strengthen body resistance to diseases, improve the blood circulation of internal organs and tissues adjacent to the colon, and can reach the effect of loosing bowels to relieve constipation, relaxing bowels but not impairing bodyfluid. Thus, the traditional Chinese medicine provided in the invention is especially suitable for middle and old aged patients.