The invention relates to blood poison eliminating capsules, which is prepared from the following raw materials: antelope horn, scorpio, centipede, unprepared rehmannia root, sinkiang arnebia root, glabrous greenbrier rhizome and talc powder. A preparation method of the blood poison eliminating capsules comprises the following steps of: smashing antelope horn, scorpio, centipede and a half of the glabrous greenbrier rhizome into fine powder and mixing uniformly for later use; decocting unprepared rehmannia root, sinkiang arnebia root and the remaining glabrous greenbrier rhizome respectively, extracting, combining decoction liquids, filtering and concentrating the filtrate into thick paste for later use; and mixing the thick paste with the fine powder, drying, smashing, mixing uniformly, adding the talc powder, mixing uniformly and filling into capsules. The blood poison eliminating capsules have a simple preparation process, low cost, high medicament bioavailability, high stability, remarkable curative effect and no remarkable toxic or side effect, are scientifically prepared from Chinese medicinal herbs serving as raw materials, and have the effects of cooling the blood and removing the toxic materials, are mainly used for treating blood poisons such as psoriasis, erythroderma, systemic lupus erythematosus, dermatomyositis and pemphigus at acute stages, severe dermatitis medicamentosa, and the like. A more convenient and quicker Chinese traditional treatment mode is provided for the clinical treatment of skin diseases.