The invention discloses a Chinese medicinal preparation for treating chronic suppurative otitis media and a preparation method thereof. An oral medicament consists of the following raw materials in parts by weight: 10-20 parts of wild buckwheat rhizome, 10-20 parts of weeping forsythia, 10-20 parts of spreading hedyotis herb, 10-20 parts of astragalus, 10-20 parts of dangshen, 10-20 parts of dogwood, 10-20 parts of dandelion, 10-20 parts of indigowoad leaf, 10-20 parts of Chinese globeflower flower, 10-20 parts of baikal skullcap root, 10-20 parts of suberect spatholobus stem, 10-20 parts of indian buead, 10-20 parts of Chinese honeylocust spine, 10-20 parts of honeysuckle flower, 10-20 parts of dahurian angelica root. An external medicament consists of the following raw materials in parts by weight: 10-20 parts of garden burnet root, 10-20 parts of fineleaf schizonepeta herb, 10-20 parts of lightyellow sophora root, 10-20 parts of szechwan Chinaberry fruit, 10-20 parts of selinum japenious seed, 10-20 parts of amur corktree bark, 10-20 parts of dried alum, 10-20 parts of common bletilla pseudobulb, 10-20 parts of mint, 10-20 parts of natural indigo, 10-20 parts of sinkiang arnebia root and 10-20 parts of red-rooted salvia root. The medicament has the effects of clearing heat, removing toxicity, eliminating dampness, astringing sores, promoting tissue regeneration and making flesh. When applied to a patient suffering from chronic suppurative otitis media, the Chinese medicinal preparation can promote the regression and absorption of pus, repair perforated tympanic membrane and recover hearing.