The invention belongs to the field of traditional Chinese medicine and particularly relates to a traditional Chinese medicine for treating rhinitis and a preparation method thereof. The traditional Chinese medicine comprises fructus xanthii, rhizoma chuanxiong, flos magnoliae, radix angelicae dahuricae, ovateleaf holly bark, Calvatia gigantea fruiting body, radix trichosanthis, fructus piperis longi, cortex phellodendri, honeysuckle flower bud, radix scutellariae, Euphorbia kansui root, fructus gleditsiae, semen brassicae, fructus bruceae, rhizoma corydalis, indigo naturalis, herba ecliptae and asarum. The traditional Chinese medicine is prepared by processes such as soaking and decocting. The traditional Chinese medicine materials of the traditional Chinese medicine directly act on nose lesions and are capable of expelling and eliminating pus, fast removing nose lesion inflammation and radically curing various rhinitis, and the traditional Chinese medicine is convenient, efficient, short in treatment cycle, low in relapse rate and free of side effects and dependency. Clinical practice of the traditional Chinese medicine on over ten thousand people shows that the traditional Chinese medicine is definite in curative effect on allergic rhinitis, nasosinusitis, paranasal sinusitis, nasal polyp, acute and chronic rhinitis and turbinate hypertrophy, low in cost, good in effect, lowin use amount and free of side effects.