The invention relates to a medicament for treating afterpains. The medicament is prepared from the following substances in parts by weight: hawthorn, cortex pseudolaricis, rhizoma acori graminei, ephedra, clove, saururus chinensis, chrysoidine, semen torreya, ramulus mori, scouring rush, herba eupatorii, rhizoma anemarrhenae, chinaroot greenbrier, milfoil, moutan bark, cynanchum glaucescens, root of kudzu vine, radix angelicae pubescentis, curcuma zedoary, selfheal, illicium verum, fructus viticis, jatamans valeriana rhizome, rhizoma curculiginis, folium artemisiae argyi, albizia flower, lonicerae flos, cortex acanthopanacis, quispualis indica, emblic leafflower fruit, Chinese olive, immature bitter orange, szechwan Chinaberry fruit, radices lithospermi, entada phaseoloides, pericarpium arecae, flos rosae rugosae, magnolia flower, Japanese polygala, radices sileris, rhizoma zingiberis, eclipta, folium turpiniae, aspongopus, edible tulip, morinda officinalis, pomegranate bark, semen pharbitidis, herba pyrolae, and marsdenia tenacissima. The medicament disclosed by the invention is available in materials, accurate in curative effect, high in effective rate by evidence of experiments, and low in cost.