The invention provides a preparation method of a traditional Chinese medicine for treating heat toxicity type reflux oesophagitis, and belongs to the technical field of preparation methods of traditional Chinese medicines. Currently, ranitidine is generally adopted for treating heat toxicity type reflux oesophagitis, but has a certain side effect. The preparation method is characterized by comprising the following steps of immersing the following traditional Chinese medicines in water, namely starwort root, creeping oxalis, buckthorn, veronicastrum herb, daghestan sweet clover herb, coffee senna seed, common alstonia bark leaf, lophatherum gracile, mungbean, dandelion, red-spotted stonecrop, shortstalk slimptop meadowrue root, breynia fruticosa, small-leaved desmodium, wintercherry, fresh golden thread, uniflower swisscentaury root, olive, taenitis carnosa mett, creeping rostellularia herb, gamboge, potentilla discolor, dutchmanspipe root, radix curcumae, shaddock, immature bitter orange, orange, selfheal, feather cockscomb seed, butterflybush flower, pipewort, scouring rush, chrysanthemum, mint, cicada slough, astragalus and liquorice; and decocting with slow fire to obtain decoction which is the traditional Chinese medicine for treating heat toxicity type reflux oesophagitis. The traditional Chinese medicine has the advantages that adverse reactions, allergy reactions and toxicity reactions caused by Western antimicrobial agents while the traditional Chinese medicine is administrated.