The invention relates to a preparation method of a traditional Chinese medicine for treating otitis media with nasal swelling, belonging to the technical field of preparation methods of traditional Chinese medicines. Otitis media with nasal swelling is currently treated generally by sulfanilamide and antibiotics which have the defect of great toxic side effects. The invention has the technical scheme of: taking magnolia flower, angelica, notopterygium root, ginger, cocklebur fruit, chastetree fruit, radix ligustici sinensis, mint, buddleia, cicada slough, patrinia heterophylla, thymeleaf sandwort, perilla leaf, fistular onion stalk, dyers woad leaf, isatis root, herba patriniae, cortex acanthopanacis, purslane, manyleaf paris rhizome, ficus, Japanese cayratia herb, sticktight, radix berberidis, green chiretta, potentilla discolor, Chinese lobelia, bistort, honeysuckle, forsythia, balloonflower and liquorice; putting the 32 medicines in water for soaking, then decocting by soft fire, and filtering for removing dregs to obtain the decocted liquid medicine, namely the traditional Chinese medicine for treating otitis media with nasal swelling. The invention has the advantages that the traditional Chinese medicine is simple to prepare, has small toxic side effects, short course of treatment and high cure rate, and also can avoid adverse reaction caused by the application of Western medicines.