The invention belongs to the field of traditional Chinese medicines, and discloses a traditional Chinese medicine composition for treating chronic prostatitis and a preparation method of the composition. The composition comprises the following components in parts by weight: 2-20 parts of rhizoma dioscoreae hypoglaucae, 2-20 parts of rhizoma acori graminei, 2-40 parts of pumpkin seed, 2-20 parts of ardisia japonica, 2-40 parts of semen coicis, 2-20 parts of dandelion, 2-40 parts of fructus alpiniae oxyphyllae, 2-20 parts of flatstem milkvetch seed, 2-20 parts of the fruit of Chinese wolfberry, 2-20 parts of spina gleditsiae, 2-20 parts of the seed of Chinese dodder, 2-40 parts of lindera aggregate and 2-40 parts of semen plantaginis. The composition can be prepared into powder or tea bags in dosage form. The preparation method comprises the following steps: crushing, baking, disinfecting and sterilizing the raw material medicines, thereby preparing the powder or the tea bags. The clinical tests show that the traditional Chinese medicine composition disclosed by the invention has the effects of tonifying deficiency, breaking stagnation to generate fresh, invigorating the kidney, strengthening Yang and the like, can improve the immunity of the organism and improve the state of prostatic fluid, is beneficial for fertilization, is rapid and stable to take the curative effect into play, is free of toxic or side effect and is a traditional Chinese healthcare medicine for treating chronic prostatitis.