Application of black garlic powder to adjustment of intestinal flora of animal

The invention discloses an application of black garlic powder to adjustment of the intestinal flora of an animal, an application of black garlic powder to preparation of a medicine, applications of the medicine, the black garlic powder and a food to adjustment of the intestinal flora of an animal, and a method for adjusting the intestinal flora of an animal. The inventor finds that the black garlic powder has the effects of significantly increasing the number of probiotics such as bifidobacteria, ruminococcus and the like in the intestinal tract of an animal and significantly adjusting the intestinal flora of the animal, thus the black garlic powder can be used for enhancing the immunity of the animal under the effects of the intestinal flora and preventing or treating diseases such as diabetes, hypertension, hyperlipidemia or tumors.