The invention discloses a traditional Chinese medicine composition for eliminating prostate pain and treating prostatitis and a preparation method thereof. Water decoction of the pharmaceutical composition formed by the traditional Chinese medicines of radix clematidis, radix scrophulariae, turpentine, cedarwood, poria cocos, fructus chaenomelis lagenariae, radix achyranthis bidentatae, parasitic loranthus, astragalus membranaceus, semen plantaginis, sea horse, sea otter, herba epimedii, cynomorium songaricum, cistanche and ginseng or medicinal wine obtained by using ethyl alcohol (or rice wine) to soak the pharmaceutical composition for more than one month is used for treating the prostatitis, about one dose of the pharmaceuticals is orally administrated for relieving the pain, about three doses of the pharmaceuticals are orally administrated for eliminating the pain, and the drugs are continuously administrated for half month, the prostate part has not any discomfort and the urine is normal, namely the prostatitis is clinically cured. The pharmaceutical is capable of directly reaching the nidus, tonifying kidney, and eliminating damp and toxin in vivo. The goal of treating the prostatitis is achieved without obvious toxic and side effects. The defects of the current pharmaceuticals for treating the prostatitis that the symptoms are cured but the disease is not cured, the analgesia is not complete, and the toxic and side effects are existent can be overcome.