The invention discloses an externally-used traditional Chinese medicine lotion for treating mammary hyperplasia, and belongs to the technical field of traditional Chinese medicine. The lotion is prepared from the following raw materials by weight: 15 g of trichosanthes kirilowii maxim, 15 g of phellodendron, 15 g of prunella vulgaris, 15 g of oldenlandia diffusa, 10 g of green tangerine peel, 10 g of myrrh, 15 g of laminaria japonica, 10 g of Zhejiang fritillaria bulb, 10 g of rhizoma sparganii, 10 g of radix bupleuri, 10 g of safflowers, 10 g of lumbricus, 10 g of frankincense, 10 g of rheum officinale, 10 g of rhizoma cyperi, and 5 g of borneol. The lotion of the invention is administrated directly by external application to affected parts, promotes local unblocked blood circulation of the breast, has the effects of clearing and activating the channels and collaterals, activating blood circulation to dissipate stasis, relieving swelling and stopping pain, clearing heat and removing toxin, can rapidly eliminate inflammation, relieve swelling, stop pain, soften and absorb mass and hyperplastic tissue, and reaches the purpose of fundamentally curing mammary hyperplasia.