The invention provides a traditional Chinese medicinal composition for preventing and treating infectious bronchitis. The traditional Chinese medicinal composition comprises dyers woad leaf, common anemarrhena rhizome, baical skullcap root, great burdock achene, figwort root, manchurian wildginger, ephedra, hogfennel root, giant knotweed rhizome, stemona root, radix asteris, milkvetch root, liquorice root, wolfberry fruit, asiatic cornelian cherry fruit and fourleaf ladybell root. The traditional Chinese medicinal composition is therapeutically effective for preventing and treating the infectious bronchitis, easy to apply, safe and free of toxic or side effect. By the aid of the traditional Chinese medicinal composition, the infectious bronchitis is not prone to relapse, bacterium is not prone to generate drug resistance, and residue of veterinary drug and public nuisance can be avoided.