A preparation method of traditional Chinese medicine lotion for treating carrion type cellulitis belongs to the technical field of traditional Chinese medicine preparation methods. Currently, antibiotic medicaments are generally used for the treatment of carrion type cellulitis, and have the disadvantage of great side effect. The technical scheme of the invention is that the preparation method comprises the following steps: soaking the following 37 herbs of herba violae, honeysuckle flower, fig, Chinese soapberry, semen calonyctionis muricati, malt culms, dandelion, dysosma versipellis, wikstroemia indica, herba saururi, radix berberidis, folium isatidis, big garden euphorbia herb, big herba lysimachiae, rhodea japonica root, aster ageratoides, subprostrate sophora, rhizoma pleionis, groundsel, lycopodium serratum, stephania, small garden euphorbia herb, meadowrue root and rhizome, purslane, leaf of Chinese coriaria, coptis, water pepper, sugarcane, cotton rose, radix sophorae flavescentis, bitter gourd, folium llicis latifoliae, elephantopus scaber, gentrin knotweed, saxifrage, radix scutellariae and licorice in water, decocting with mild fire, filtering to remove residues so as to obtain the medicinal liquid which is the traditional Chinese medicine lotion for treating carrion type cellulitis. The advantages are that the prepared traditional Chinese medicine is less in toxicand side effect, short in treatment course, and high in cure rate.