The invention discloses a medicament for treating ureteral calculus. The medicament is prepared from the following main raw materials in parts by weight: 5-10 parts of Indian bread peel, 9-15 parts of India madder root, 6-9 parts of sunflower pith, 8-16 parts of root of lobed kudzuvine, 8-15 parts of fruit-spike of common selfheal, 9-15 parts of snakegourd fruit, 6-10 parts of cassia bark, 4-9 parts of villous amomum fruit, 4-9 parts of hairyvein agrimony, 8-12 parts of bamboo shavings, 9-15 parts of malaytea scurfpea fruit, 5-10 parts of herb of christina loosestrife, 10-20 parts of tip of licorice root, 10-20 parts of herb of french marigold, 9-18 parts of white peony root, 8-12 parts of immature bitter orange, 6-9 parts of blackend swallowwort root and 6-10 parts of sea-ear shell. All the raw medicinal materials are reasonable in compatibility and smooth in drug property, and have a significant curative effect on ureteral calculus by promoting the reduction of calculi by loosening ureters, smoothening body orifices or openings, ensuring proper downward flow of the blood and the like.