The invention provides medicinal liquor for treating rheumatic arthritis, hyperosteogeny and lumbar disc herniation, and a preparation method thereof. The medicinal liquor is prepared from the following raw materials in parts by weight: 43-47 parts of common threewingnut roots, 8-12 parts of raw kusnezoff monkshood roots, 8-12 parts of raw sichuan axonite roots, 7-11 parts of cassia twigs, 7-11 parts of Chinese angelica roots, 7-11 parts of achyranthes bidentata, 7-11 parts of pawpaw, 7-11 parts of safflower, 7-11 parts of notopterygium roots and 150-250 parts of white spirit. The preparationmethod comprises the following steps: a, decocting the common threewingnut roots, raw kusnezoff monkshood roots and raw sichuan axonite roots with big fire for 30-60 minutes; and b, adding other traditional Chinese medicines, and carrying out decoction twice; and c, mixing the decoction, carrying out concentrating, and then adding the white spirit, white spirit uniform mixing, and bottling. Compared with the prior art, the common threewingnut roots with are used for treating rheumatic stubborn arthralgia; meanwhile, a specific preparation method is applied, the toxicity of the medicinal materials is reduced, the medication effect is enhanced, the aim of curing severe rheumatism is achieved, and the cure rate reaches 95% or above.