The invention provides a traditional Chinese medicinal composition of heart-fire clearing herbal tea and a preparation method thereof. The composition comprises Chinese olive, rhizoma phragmitis, Japanese ginseng leaf, crataegus pinnatifida, Chinese dates, dendrobe, polygonatum odoratum, liquorice, lalang grass rhizome, watermeion peel, radix ophiopogonis, rhizoma atractylodis, eucommia, ganoderma lucidum, divaricate saposhnikovia root, herba houttuyniae, raw ginger, fortune eupatorium herb, honeysuckle, medlar, aged tea, magnolia officinalis, Chinese mosla herb, lespedeza cuneata, feverfew, astragalus membranaceus, raw rhizoma polygonati, lophantherum gracile, kudzuvine root, mint, pogostemon cablin, mesona blume, lotus leaf, raw pear, mungbean, sugar cane, raw white hyacinth bean flower, poria, medicated leaven, malt, atractylodes macrocephala koidz, American ginseng, fructus forsythiae, tremella, water chestnut, momordica grosvenori swingle, lemon, amomum and fructus caryophylli, and has the advantages of good heart-fire clearing and internal-fire removing effect and simple production process. The herbal tea does not have toxic or side effect, is mellow and smooth in taste, can be drunk for a long time, and has a good health-care effect.