The invention relates to the field of traditional Chinese medicines, and in particular relates to buccal tablets for treating mouth ulcer and a preparation method thereof. The buccal tablets for treating mouth ulcer are prepared from the following 
traditional Chinese medicine raw materials in parts by weight: 4-6 parts of 
bezoar, 4-6 parts of 
borneol, 6-8 parts of liquorice root, 4-6 parts of 
alunite, 15-20 parts of 
medicine terminalia fruit, 10-12 parts of medcinal evodia fruit, 6-8 parts of raw 
arisaema consanguineum schott, 4-6 parts of 
ginseng, 10-12 parts of Chinese yam, 10-12 parts of 
bark of Chinese corktree, 6-8 parts of manchurian wildginger, 4-6 parts of 
honeysuckle flower, 15-20 parts of weeping 
forsythia capsule, 10-12 parts of wrinkled gianthyssop 
herb, 10-12 parts of costustoot, 8-10 parts of fortune 
eupatorium herb, 15-20 parts of Indian buead, 10-12 parts of medicated leaven, 6-8 parts of immature bitter orange, 15-20 parts of root of lobed kudzuvin and 10-12 parts of largehead atractylodes 
rhizome. The 
traditional Chinese medicine disclosed by the invention is short in treatment course and quick in action, can be used for astringing and promoting 
granulation, diminishing 
inflammation, relieving pain, and repairing mucosa, can be used for treating both symptoms and root causes, hardly causes relapse, also is relatively low in cost, ensures that the 
immunity of a patient can be enhanced for the whole life after the patient is treated for once; the 
traditional Chinese medicine disclosed by the invention is convenient to use and is suitable for popularization and application.