The invention relates to a preparation method of a traditional Chinese medicine for treating acute bronchitis caused by overeating raw scallions, belonging to the technical field of preparation methods of traditional Chinese medicines. The existing method for treating acute bronchitis caused by overeating raw scallions generally adopts antibiotics and sulfonamides, and has the defect of great toxic and side effects. The technical scheme is as follows: the preparation method comprises the following steps: taking lance asiabell root, groundsel, Stephania japonica, hairy euphorbia, Radix et Rhizoma Thalictri, Coriaria sinica, verbena, tartarian buckwheat root, fig, shrubalthea bark, common lantana, Ardisia crenata, Fructus Forsythiae, roughhaired holly root, honey-suckle stem, frangipani, Elephantopus scaber, saxifrage, Herba Patriniae, Hemsleya macrosperma, tropaeolum, Bidens biternata, tea, creat, birch bark, dayflower, belamcanda rhizome, bistort, coptis, Broomjutre Sida Herb, iron holly bark, Schefflera octophylla, lophatherum, water pepper, licorice and the like; and soaking the traditional Chinese medicines in water, decocting with soft fire, and filtering to remove slag to obtain liquor, thereby obtaining the traditional Chinese medicine for treating acute bronchitis caused by overeating raw scallions. The prepared traditional Chinese medicine has the advantages of small toxic and side effects, short treatment course and high cure rate.