The invention discloses a drug for nursing and treating herpes zoster and a preparation method of the drug. The drug comprises the following raw herbal medicines: pilea cavaleriei, hainan ervatamia root, kalanchoe laciniata, humifuse euphorbia herb, herb of argun groundsel, fishing pole, dayflower, peruvian groundcherry herb, philippine violet herb, elephantopus scaber, shellac, herb of common achyranthes, crocus sativus, hylotelephium verticillatum, salvia chinensis, salvia evansiana, renanthera coccinea, common andrographis herb, adenosma indianum, ovateleaf holly bark, aizoon stonecrop herb, three-leaved pronephrium herb, trichosanthes palmate, root of beautiful cotoneaster, veronicastrum caulopterum, fiveleaf akebia fruit, trifoliate orange, lindera aggregate, poria cocos, thymifoious euphorbia herb, fructus kochiae, wheat bran and radix glycyrrhizae. The drug has the beneficial effects of clearing away heat and toxic materials, promoting blood circulation to remove blood stasis, and relieve swelling and pains, and discharging liver and regulating qi, and is used for nursing and treating herpes zoster. Guided by the conventional theory of traditional Chinese medicines, the green and pollution-free pure natural drugs are adopted, so that the drug is safe and effective, and free of toxic or side effect. The drug is convenient to dose, simple to formulate, simple in preparation process, quick in effect-taking and short in treatment time, and is easily accepted by a patient,.