The invention relates to a traditional Chinese medicine composition for treating chronic prostatitis and a preparation method thereof. The traditional Chinese medicine composition is prepared from thefollowing raw materials in parts by weight: 8 to 12 parts of cortex eucommiae chlorogenic acid, 6 to 10 parts of cortex cinnamomi polyphenol, 13 to 17 parts of oyster peptide, 8 to 12 parts of maca,8 to 12 parts of cordyceps militaris, 13 to 17 parts of silk peptide, 2 to 6 parts of herba abelmoschi esculenti, 2 to 6 parts of cortex pausinystaliae macroceras, 2 to 6 parts of catuaba, 2 to 6 parts of herba epimedii, 2 to 6 parts of herba gynostemmatis, 2 to 6 parts of herba rhodiolae, 2 to 6 parts of radix salviae miltiorrhizae and 2 to 6 parts of semen persicae. The traditional Chinese medicine composition disclosed by the invention is simple in preparation and remarkable in curative effect, has no side effect, is safe and effective, is low in cost and is suitable for oral administration.