Injection for treating milk cattle mastitis and preparation method thereof

The invention discloses an injection for treating bovine mastitis and a preparation method thereof. The injection is characterized in that each 100 milliliters of the injection consists of 25 to 70 grams of coptis root crude medicines, 25 to 70 grams of dandelion crude medicines, extract which is subjected to aqueous extraction and alcohol precipitation by 25 to 70 milliliters of pig bile, and 1.5 to 12 grams of lincomycin. The preparation method is as follows: the injection is refined by aqueous extraction and alcohol precipitation for multiple times. The injection has strong functions of bacteriostasis and sterilization on Staphylococcus aureus, streptococcus and Escherichia coli, simultaneously has the functions of nonspecific anti-inflammation and immunoregulation, and can obviously inhibit proliferation of the Staphylococcus aureus in mammary glands, reduce PMN infiltration, and reduce the TNF-alpha level and the TNF-gamma level of the mammary tissue and the TNF-gamma level of blood serum, so as to relie