The invention provides a traditional Chinese medicine composition for treating hyperplasia of mammary glands. The traditional Chinese medicine composition is prepared from the ingredients in parts by weight: bupleurum root, nutgrass galingale rhizome, green tangerine peel, angelica sinensis, chuanxiong rhizome, salvia miltiorrhiza, manis pentadactyla Linnaeus, rhizoma zedoariae, raw oyster shell, radix astragali, poria cocos, seaweed, herba leonuri, rhizoma sparganii, deer horn, dried old orange peel, peach kernel, thunberg fritillary bulb, selfheal spike, frankincense, codonopsis pilosula, tangerine seed, glycyrrhiza uralensis, rhubarb root, cowherb seed, safflowers, radix curcumae, luffa cylindrica, radix asparagi, dandelions, rhizoma pleionis, curculigo orchioides, evodia, epimedium, myrrha, litchi seed and radix isatidis. The traditional Chinese medicine composition provided by the invention is used for treating diseases such as hyperplasia of mammary glands, benign tumor of mammary glands and hysteromyoma, is remarkable in effect and is free of toxic or side effects, the effective rate of treatment reaches 95%, and recurrence is difficult.