The invention discloses a Chinese herbal medicine additive in animal feed. The Chinese herbal medicine additive comprises, by mass, 7-40 parts of radix scutellariae, 7-40 parts of coptis chinensis, 7-40 parts of cortex phellodendri, 10-50 parts of radix lsatidis, 8-50 parts of honeysuckle flower, 10-60 parts of folium isatidis, 10-60 parts of dandelion and 20-120 parts of tamarix ramosissima. The Chinese herbal medicine additive can be used for prevention and cure of animal foot-and-mouth disease. The Chinese herbal medicine additive can further comprise codonopsis pilosula, astragalus, herba houttuyniae, hawthorn, atractylodes, acorus tatarinowii, red-knees herb, euphorbia prostrate, mulberry leaves and licorice and the like. The Chinese herbal medicine additive can be added into the animal feed, and the animal feed can be applied to preparation of feed food for promoting defecation of animals or improving appetite of the animals and can prevent or cure animal diseases such as animal influenza, swine erysipelas, foot-and-mouth disease, blue-eared pig disease or animal clostridium welchii enteritis.