The invention discloses a traditional Chinese medicine preparation for treating acute mastitis and a preparation method, and belongs to the field of traditional Chinese medicines. The traditional Chinese medicine preparation is prepared from Lapsana apogonoides, willow roots, coralhead plant stem with leaves, polycarpae, apios fortunei max, impure mirabilite, australian cowplant roots or leaves, swamp violet, common adenostema herb, Japanese apricot, Trikeraia hookeri, roots of small diuranthera, canarium pimela, tangerine seeds, medulla of stachyurus and hygrophila salicifolia. According to the traditional Chinese medicine preparation, the adopted medicines are suitable in compatibility and complement each other, the traditional Chinese medicine preparation has the effects of clearing away heat and toxic materials, dispelling wind, removing pain, eliminating stasis to subdue swelling, resolving hard lumps, discharging liver, regulating qi and the like, the medicines are combined so that the medicine effect can reach the diseased region directly, and the traditional Chinese medicine preparation has the advantages of being capable of taking effect quickly, high in curative rate, free of toxic and side effects, safe, convenient to use and the like for treating symptoms such as poor mammogenesis, nipple discharge and burning pain caused by acute mastitis, and is low in price, easy to prepare and capable of being widely applied to clinic treatment of acute mastitis.