Objective To investigate the efficacy of Dan'e-Fukang soft extract for dysmenorrhea associated with endometriosis.Methods A total of 88 patients with dysmenorrhea associated with endometriosis were randomly recruited into a treatment group and a control group. The patients in the control group were treated with gestrinone, while the patients in the treatment group were treated withDan'e-Fukang soft extract. The therapeutic efficacy, improvement of dysmenorrhea and drug safety after the treatment were observed in both groups.Results The total effective rate of in the treatment group(95.45%, 42/44), was apparently higher than that in the control group(81.82%, 36/44)(χ2=4.062,P<0.05). The dysmenorrhea improvement in the treatment group was better than that in the control group and also better than that before treatment in both groups(allP<0.05). The adverse reaction rate in the control group(22.73%,10/44) was higher than that in the treatment group(9.09%, 4/44)(χ2=5.906,P<0.05).ConclusionsDan'e-Fukang soft extract has a definite clinical efficacy for dysmenorrhea associated with endometriosis, can ameliorate the symptoms of dysmenorrhea.