The invention provides a traditional Chinese medicine preparation for treating periodontitis. The traditional Chinese medicine preparation is prepared from the following raw materials: drynaria rhizome, fructus viticis, rhizoma anemarrhenae, moutan bark, houttuynia cordata, caulis spatholobi, eclipta, radix scrophulariae, the seed of Chinese dodder, rhizoma polygonati, root of common peony, rheum officinale, polygonum cuspidatum, changium smyrnioides, licorice root, fraxinus bungeana, ixora chinensis, cassia twig, radix curcumae longae, selaginella tamariscina, parasitic loranthus, morinda officinalis, cryptotaenia japonica, bauhinia championii, honeysuckle stem, dogwood, cortex acanthopanacis, alpine yarrow herb, isodon amethystoides, aster ageratoides, cistanche, cimicifugae foetidae and panax japonicus. The traditional Chinese medicine preparation is stable in action and small in side effect, and can be used for effectively relieving the symptom of the periodontitis so as to improve the living quality of a patient. In addition, the traditional Chinese medicine preparation cannot perform toxic and side effects.