The invention relates to a preparation method of a traditional Chinese medicine for treating hyperlipemia caused by overeating deep-fried food, belonging to the technical field of preparation methods of traditional Chinese medicines. The existing method for treating hyperlipemia caused by overeating deep-fried food generally adopts lipid regulators, and has the defect of great toxic and side effects. The technical scheme is as follows: the preparation method comprises the following steps: taking Dysosma versipellis, berberis root, Herba Lysimachiae, lance asiabell root, rhizoma pleionis, Stephania japonica, verbena, fig, Hibiscus mutabilis, common lantana, bracken, water pepper, maidenhair, Fructus Forsythiae, needle filings, herba abri, rhizoma anemarrhenae, herba houttuyniae, ampelopsis root, Solanum Vine, figwort, lobelia chinensis, japaness St. johnswort, Lespedeza cuneata, bat's dung, sticktight, creat, birch bark, water shield, self-heal, dayflower, cat's-foot, melic grass, carrot, medicated leaven and licorice; 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 hyperlipemia caused by overeating deep-fried food. The prepared traditional Chinese medicine has the advantages of small toxic and side effects, short treatment course and high cure rate.