The invention relates to a traditional Chinese medicine composition for treating periodontitis. The traditional Chinese medicine composition is prepared from, by weight, 10-30 parts of herba ecliptae, 5-25 parts of rhizoma drynariae, 5-20 parts of solanum nigrum herbs, 10-30 parts of carthamus tinctorus herbs, 5-25 parts of edible fungi, 5-25 parts of dendrobe, 5-25 parts of gypsum rubrum, 5-20 parts of rhizoma bletillae, 5-25 parts of uniflower swisscentaury roots, 5-25 parts of clinopodium chinense herbs, 5-20 parts of pangolin scales, 5-25 parts of radix sanguisorba, 5-25 parts of herba pteridis multifidae, 5-20 parts of sophora flowers, 5-25 parts of tortoise plastron, 5-20 parts of gypsum, 5-25 parts of phyllanthus virgatus herbs, 5-20 parts of shepherd's purse, 5-25 parts of Chinese ixora flowers, 5-20 parts of folium sennae, 5-20 parts of herba eupatorii, 5-25 parts of pseudo-ginseng, 5-25 parts of radix sophorae subprostratae and 5-15 parts of liquorice roots. The traditional Chinese medicine composition has the effects of nourishing kidney, restraining hyperactivity of yang, tonifying stomach, promoting fluid, benefiting qi, nourishing blood, nourishing yin to lessen fire, relieving swelling, evacuating pus, cooling blood and hemostasis, and has a remarkable treatment effect on periodontitis and reliable functions.