The invention discloses a traditional Chinese medicine decoction for promoting lactation of postnatal women. The traditional Chinese medicine decoction is composed of, by weight, 10-15 parts of ricepaper pith, 2-4 parts of teasel root, 5-7 parts of Chinese thorowax root, 3-5 parts of three-nerved spicebush root, 6-8 parts of Szechuan lovage rhizome, 4-6 parts of scorched hawthorn fruit, 2-4 parts of hairy asiabell root, 4-6 parts of common cnidium fruit, 1-3 parts of prepared rehmannia root, 2-4 parts of cowherb seed, 6-8 parts of pangolin, 3-5 parts of sophora root, 2-4 parts of gordon euryale leaf, 6-8 parts of prepared pinellia, 4-5 parts of poria cocos, 2-4 parts of black soybean leaf, 1-3 parts of muskroot-like semiaquilegia root, 4-6 parts of dandelion, 2-4 parts of ficus lyrate, 1-2 parts of Jizihuang, 1-2 parts of Chinese thesium root, 2-4 parts of spotted spurge and 2-4 parts of hibiscus root. The traditional Chinese medicine decoction has efficacy of soothing liver and relieving depression, promoting qi circulation and reducing phlegm, dispelling blood stasis and diminishing inflammation and removing stasis and stopping pain, and can dredge breast duct and breast milk excretion passage to smooth breast milk excretion, the problem of postnatal milk deficiency is solved fundamentally, and effect of treating both symptoms and root causes can be realized.