The invention discloses a traditional Chinese medicine composition for treating acute mastitis. The acute mastitis belongs to the range of acute mastitis in traditional Chinese medicine science. In traditional Chinese medicine science, the aetiological agent of acute mastitis is blocking of main and collateral channels and accumulation of pathogenic heat to pus due to unsmooth discharge of milk or improper diet and heat accumulated in yangming meridians caused by affect-mind internal damage and liver-qi depression in the lactation period and no controlling and dredging and orderly reaching of liver. According to the traditional Chinese medicine composition disclosed by the invention, traditional Chinese medicines: caesalpinia minax hance, ixeris sonchifolia hance, whiteflower violet herb with roots, indigo naturalis, sago leaves, marigold, Scutellaria indica, longpeduncle kadsura roots, Rubia yunnanensis, spiral shells, rubus irenaus focke and spongetree roots which have the functions of clearing away heat and toxic materials, promoting the circulation of qi and removing stasis, activating blood circulation and dredging collaterals and promoting tissue regeneration and relieving pains are selected and decocted to decoction. Through clinical tests in our hospital, the total effective rate reaches 96.7%, and the curative effect is remarkably better than that of the control group.