Chinese medicinal extract for treating urarthritis, as well as preparation method and application thereof

The invention relates to a Chinese medicinal extract for treating urarthritis, and the Chinese medicinal extract is characterized by being prepared from the following raw material drugs: Illicium henryi root bark, Illicium henryi root, Illicium henryi stem leaves, anisetree bark, Illicium jiadifengpi or albizia julibrissin, wherein the content of total flavonoid in the extract is between 20 and 80 percent. The invention also provides a preparation method and application of the Chinese medicinal extract, as well as a preparation method and application of quercetin. The invention has the advantages that: pharmacological tests prove that the extract mainly prepared from illicium plant has remarkable prevention and treatment effects on acute urarthritis, does not have toxic or side effect, and can be used for preparing medicaments for preventing and treating urarthritis, and rheumatic or rheumatoid arthritis; new application of the quercetin in urarthritis treatment is discovered; according to the preparation method provided by the invention, toxic components are removed, active components are concentrated and remained, the application curative effect and safety are improved, thereby facilitating the safe application in medical industry and related industries.