The invention discloses tradition Chinese medicine composition for treating placental retention of cattle after delivery and a preparation method. The traditional Chinese medicine composition comprises raw materials as follows: suberect spatholobus stems, mioga ginger, schisandra propinqua, fragrant sarcococca herb, rhizoma corydalis, roots of sheathed monkshood, herba of Polygonum rude Meisn., themeda japonica, motherwort herb, hiraute shiny bugleweed herb, radish seeds, ginseng, levant cotton roots, argy wormwood leaves, dipelta yunnanensis Franch., roots of shrubby elsholtzia, poria cocos, immature bitter orange, tangerine peel, gordon euryale seeds, liquorice, dandelion, heartleaf houttuynia herb, weeping forsythiae capsule, thin evodia twigs and leaves, herb of tonkin pepper, euonymus alatus (Thunb.) Sieb, fortune's drynaria rhizomes, malaytea scurfpea fruit and common macrocarpium fruit. The traditional Chinese medicine composition has the benefits as follows: the traditional Chinese medicine composition mainly performs the functions of qi tonification, promotion of blood circulation, meridian warming, stagnancy dredging, stasis removal and pain relief, can be used for treating placental retention of the cattle after delivery, has a remarkable treatment effect and has few toxic and side effects due to the fact that the Chinese herbal medicines are pure natural; the preparation process is simple and convenient, the immunity of the organism can be improved through scientific compatibility and elaborate selection of the medicines, and drug resistance cannot be caused.