The invention relates to a traditional Chinese medicine composition for treating hyperplasia of mammary glands, and belongs to the field of traditional Chinese medicines. The traditional Chinese medicine composition is prepared from the following medicinal raw materials in parts by weight: 10-15 parts of antler plate, 5-10 parts of thunberg fritillary bulb, 2-5 parts of uniflower swisscentaury root, 2-5 parts of rhizoma cyperi and 2-5 parts of selfheal. The traditional Chinese medicine composition is prepared according to guidance of traditional Chinese medicine theories for the causes, like kidney-asthenia and liver depression, qi and phlegm stagnation and blood stasis of hyperplasia of mammary glands, wherein the antler plate is used as a monarch drug to achieve the effects of warmly tonifying liver and kidneys and promoting blood circulation to diminish swelling; thunberg fritillary bulb and selfheal are used as ministerial drugs to enhance the monarch drug effects for opening hepatic depression, clearing liver and inhibiting tumors; uniflower swisscentaury root is used as an adjuvant drug to achieve the effects of promoting lactation and orifices, clearing heat and removing toxicity; and rhizoma cyperi serving as a guiding drug can be used for introducing drugs into the liver channel to sooth liver, resolve depression, removing stagnation and dredging channels. The whole formula is scientific in compatibility and simple in formula, the medicinal raw materials are synergized to achieve the effects of soothing liver, resolving depression, softening hard lumps, dispelling nodes, dredging channels and relieving pain. The traditional Chinese medicine composition has a mild drug property, small toxic and side effect and a remarkable effect of treating hyperplasia of mammary glands.