The invention discloses a Chinese herbal medicine additive for animal feed, which comprises the following components in parts by mass: 7-40 parts of Huang Ling, 7-40 parts of Coptidis Rhizoma, 7-40 parts of Cortex Phellodendri, 10-50 parts of Banlangen, 8-40 parts of Shuanghua 50 parts, 10-60 parts of Daqingye, 10-60 parts of dandelion and 20-120 parts of Tamarix, the Chinese herbal medicine additive can be used to prevent and treat animal foot-and-mouth disease. The Chinese herbal medicine additive can also include other components such as Codonopsis pilosula, Radix Astragali, Houttuynia cordata, Hawthorn, Atractylodes atractylodes, Shichangpu, Polygonum spicosa, Pudijin, mulberry leaves and licorice. The Chinese herbal medicine additive of the present invention can be added to animal feed, and the animal The feed can be used in the preparation of feed and food to promote animal defecation or increase animal appetite, and can also prevent or treat animal diseases, including animal influenza, swine erysipelas, foot-and-mouth disease, pig blue ear or animal Clostridium welchii enteritis, etc.