The invention discloses a traditional Chinese medicine granule for treating otitis media and a preparation method of the traditional Chinese medicine granule. The traditional Chinese medicine granule for treating otitis media is prepared from the following raw materials in parts by weight: sida acuta burm. F, fructus forsythia, north china iris root, astragalus membranaceus, centella asiatica, emblic leafflower fruit, rhizoma alismatis, hypericum japonicum, pear bark, cocklebur fruit, arachis pintoi, cicada slough, purslane, fig, spanishneedles herb, honeysuckle, diversecolor cinquefoil, roughhaired holly root, borneol, fistular onion stalk, perilla leaf, violet magnolia, liquorice, codonopsis pilosula and Japanese cayratia herb. The preparation method of the traditional Chinese medicine granule for treating otitis media comprises the following specific steps: weighing various raw materials; extracting essential oil of honeysuckle, astragalus membranaceus, fructus forsythia and codonopsis pilosula by adopting a supercritical fluid extraction method; respectively preparing filtrate A and filtrate B by decocting with a slow fire and filtering; and concentrating and drying to obtain the traditional Chinese medicine granule. The traditional Chinese medicine granule is simple and convenient to prepare, simple in process, economical, effective, short in treatment course and high in recovery rate, and has the efficacies of removing plug, expelling pus, eliminating dampness and astringing sores, and is mainly used for treating earache, fever, vomiting, cough and the like caused by the otitis media.