Selenium-rich fermented Chinese herbal medicine animal feed additive for treating endometritis of sows

The invention relates to an animal feed additive, in particular to a selenium-rich fermented Chinese herbal medicine animal feed additive for treating endometritis of sows. One object of the invention is to provide a selenium-rich fermented Chinese herbal medicine animal feed additive that can treat the endometritis of the sows effectively aiming at the existing problems in the current treatment of the endometritis of the sows. The second object of the invention is to provide a preparation method for the animal feed additive. In order to achieve the above objects, the technical scheme of the invention is that the selenium-rich fermented Chinese herbal medicine animal feed additive for treating the endometritis of the sows comprises the following ingredients: 20g of selenium-rich fermented tea, 10g of rhizoma anemarrhenae, 10g of fructus corni, 10g of moutan bark, 10g of rhizoma alismatis, 12g of grifola, 10g of herba ecliptae, 10g of cortex phellodendri, 10g of bighead atractylodes rhizome, 10g of peach kerne