The invention relates to a medicine for treating rheumatic arthritis and rheumatoid arthritis and a method for preparing the medicine. The medicine is mainly prepared from pharmaceuticals of polyrhachis vicina roger, zaocys dhumnades, radix aconiti preparata, radix rehmanniae, tripterygium wilfordii, radix clematidis, paniculate swallowwort root, suberect spatholobus stem, herba epimedii, anemarrhena asphodeloides, cornu cervi, buthus martensi karsch, centipede and earthworm, pseudo-ginseng, astragalus, pawpaw, herba taxilli, eucommia ulmoides, radix achyranthis bidentatae, ligusticum chuanxiong and the like. The medicine is used for treating the rheumatoid arthritis and the rheumatic arthritis of finger morning stiffness, muscle and join pain, inhibited bending and stretching, muscle emaciation and anchylosis and malformation, and has the functions of tonifying kidney and strengthening bones, activating blood and relieving wind, dispelling cold and clearing dampness, an exact curative effect and no toxic and side effects.