The invention discloses a traditional Chinese medicine composition for treating postnatal conspitation of a sow. The traditional Chinese medicine composition is prepared from the following raw materials in parts by weight: 15 to 30 parts of radix codonopsis, 10 to 15 parts of radix rehmanniae preparata, 8 to 15 parts of radix ophiopogonis, 6 to 10 parts of radix aucklandiae, 8 to 16 parts of poriacocos, 7 to 13 parts of bighead atractylodes rhizome, 5 to 9 parts of pericarpium citri reticulatae and 6 to 10 parts of liquorice root. The invention also provides a preparation method and application of the traditional Chinese medicine composition. The traditional Chinese medicine composition disclosed by the invention has the beneficial effects that from a holism concept of traditional Chineseveterinarian medicine, the traditional Chinese medicine is capable of tonifying both qi and blood according to the theory of therapy with syndrome differentiation of the traditional Chinese veterinarian medicine and by combining with clinical characters of the postnatal conspitation of the sow, and the traditional Chinese medicine is capable of tonifying the spleen in transportation according toa principle of searching for the primary causes of disease in treatment' of the traditional Chinese veterinarian medicine; qi and blood are alternative and interdependent, qi tonifying must be firstlycarried out if blood tonifying is required, generation of qi and blood also must depend on transportation and transformation of the spleen, and most blood tonifying products are sticky and greasy andare difficult to absorb, so that the traditional Chinese medicine composition is capable of dredging the blockage and helping absorption while invigorating the spleen and benefiting qi; the radix aucklandiae and the pericarpium citri reticulatae are added for promoting the circulation of qi, so that the whole formula is tonic but not greasy and is tonic but not jammed; the radix ophiopogonis is added, so that the traditional Chinese medicine composition is capable of nourishing yin, engendering liquid and relieving dryness of intestinal tract, and the purposes of treating both symptoms and root causes and treating the symptoms by searching for the root causes are achieved.