The invention discloses a Chinese medicine for treating retention of urine, which is prepared from the following Chinese medicinal raw materials by weight: 18 to 22 grams of astragalus, 2 to 5 grams of cassia bark, 4 to 7 grams of Chinese eaglewood, 4 to 7 grams of belvedere fruit, 10 to 12 grams of talc, 18 to 22 grams of cluster mallow fruit, 18 to 22 grams of cowherb seed, 9 to 11 grams of pyrrosia leaf, 5 to 7 grams of peach seed, 12 to 14 grams of root of red-rooted salvia, 12 to 14 grams of red paeony root, 2 to 5 grams of juncus pith, 9 to 12 grams of chaff flower root, 5 to 8 grams of common anemarrhena rhizome and 5 to 8 grams of phellodendron. The Chinese medicine consists of the Chinese medicinal raw materials, is administrated orally by an aqueous solution agent, and has an obvious treatment effect.