The invention discloses a drug used for treating gout. The drug comprises, by weight, 60g of shark cartilage, 90g of cortex eucommiae, and 90g of radix achyranthis bidentatae. A preparation method comprises following steps: 60g of shark cartilage is baked and grinded, is divided into 12 parts, and is packaged; one part of the processed shark cartilage is taken in two times each day; cortex eucommiae and radix achyranthis bidentatae are fried with salt water, and are decocted with water so as to obtain a decoction, and the obtained decoction is divided into 24 parts. The processed shark cartilage is taken together with the decoction. Cortex eucommiae is sweet in taste, slightly pungent, and warm in nature, belongs to liver and kidney channel, is capable of harmonizing gas and reducing moisture, nourishing liver and kidney, strengthening bones and muscles, and preventing miscarriage, and is mainly used for treating waist and knee pain, erectile dysfunction, spermatorrhea, frequent micturition, long lasting urinating, yang-hyperactivity and arthralgia spasm pain, rheumatic arthralgia, pruritus vulvae, threatened abortion, miscarriage and abortion. Radix achyranthis bidentatae is sweet, bitter, and sour in taste, and is neutral in nature; raw radix achyranthis bidentatae is capable of dispersing blood stasis, and relieving carbuncle swollen, and is mainly used for treating gonorrhea, hematuria, amenorrhea, abdominal mass, dystocia, placenta retension, postpartum blood stasis and stomachache, pharyngitis, carbuncle swollen, injuries from falls, fractures, contusions and strains; and processed radix achyranthis bidentatae is capable of nourishing liver and kidney, and strengthening bones and muscles, and is mainly used for treating waist knee bone pain, arms and legs contracture, and atrophy and flaccidity.