The invention discloses a 
traditional Chinese medicine additive capable of improving the 
lactation yield of diary cow and a preparation method thereof. The 
traditional Chinese medicine additive capable of improving the 
lactation yield of the diary cow comprises the common components in part by weight: 15-19 parts of rhizoma polygonati, 15-18 parts of radix polygoni multiflori, 7-12 parts of 
astragalus membranaceus, 7-10 parts of 
angelica sinensis, 5-9 parts of spina gleditsiae, 5-9 parts of 
codonopsis pilosula, 5-9 parts of uniflower swisscentaury root, 5-8 parts of fructus liquidambaris, 5-8 parts of 
tribulus terrestris and 5-8 parts of ricepaperplant 
pith. The preparation method of the 
traditional Chinese medicine additive comprises the following steps: mixing the medicinal materials according to proportion, 
processing the medicinal materials into 
medicine powder being 50-70 meshes, adding 30% of 
purified water and proper amount of brown 
sugar into the 
medicine powder, fermenting naturally to form ferment, 
grinding medicine residue after extracting a ferment liquid by a high-speed 
grinding machine into paste; mixing the paste with other feed raw materials in proportion, mixing high-quality bacillus and high-quality purified 
saccharomycetes fully, and fermenting again for 36 hours, thereby preparing the traditional Chinese medicine additive capable of improving the 
lactation yield of diary cow. The traditional Chinese medicine additive has the effects of being mild in medicine property, being easy to absorb and improving the lactation yield of diary cow.