The present invention discloses a feed preventing cattle flu which includes the following raw materials in parts by weight: 310-350 parts of silage, 120-140 parts of wheat bran, 350-550 parts of corns, 50-150 parts of peanut meal, 10-30 parts of rosa roxbunghii fruit dregs, 50-150 parts of carrots, 80-120 parts of pumpkins, 50-150 parts of garlic stems and leaves, 70-150 parts of corn germ meal, 70-150 parts of fermented glutinous rice, 10-30 parts of edible salt and 63-103 parts of Chinese herbal medicine compositions. The Chinese herbal medicine compositions comprise the following components in parts by weight: 4-6 parts of radix astragali, 4-6 parts of radix codonopsis, 4-6 parts of radix glycyrrhizae preparata, 4-6 parts of flos lonicerae, 4-6 parts of fructus forsythiae, 2-4 parts of folium isatidis, 8-12 parts of baphicacanthus cusia, 2-4 parts of herba ephedrae, 2-4 parts of almonds, 4-6 parts of plaster, 2-4 parts of bitter platycodon grandiflorus, 3-5 parts of mulberry leaves, 3-5 parts of chrysanthemum, 4-6 parts of pharagmitis rhizoma, 4-6 parts of fructus arctii, 2-4 parts of bamboo leaves, 1-3 parts of radix aucklandiae, 4-6 parts of herba artemisiae annuae, and 2-4 parts of dried orange peel.