The invention relates to a traditional Chinese medicinal preparation for treating the postpartum hypogalactia, and a preparation method thereof. Raw materials for preparing the effective components of the traditional Chinese medicinal preparation comprise Quisqualis indica, Tenacious Condorvine Stem, Eucommia ulmoides, Rhizoma Paridis, Nomame Semaherb, Ixeris chinensis, leaf of Raphanus sativus L., Picrasma quassioides, asparagus lettuce, Sargentodoxa cuneata, Herba Taraxaci, life plant, Ligusticum wallichii, Hemerocallis fulva, Lance Asiabell Root and Codonopsis lanceolatae. The traditional Chinese medicinal preparation has the efficacies of marrow tonifying, bone strengthening, vital essence generating, blood nourishing and milk secretion stimulating, and can effectively enhance the milk secretion, promote the breast development, tonify qi and blood, strengthen the spleen and stomach, dredge the liver depression, adjusts yin and yang, nourish blood and yin and promote lactation. The preparation is a pure traditional Chinese medicinal preparation, is an affinal drug and dietnatural formula containing blood circulation invigorating and vein relaxing medicines, can dredge the mammary ducts and get through the milk excretion channel to realize smooth milk excretion, so the problems of postpartum hypogalactia and milk deficiency are fundamentally solved, and the simultaneous treatment effect of principal and subordinate symptoms is realized.