Objective:To explore the therapeutic efficacy of Bushen Huayu decoction coloclysis in the treatment of ovarian endometriosis(EMT). MethodsSixty-four patients with ovarian EMT were included and randomly divided into the treatment group (33 cases) and the control group (31 cases). The patients in the treatment group were treated with Bushen Huayu decoction coloclysis and the patients in the control group were orally treated with Guizhi Fuling decoction, with a course of 3 months. The scores of dysmenorrhea and the cyst volume of endometriosis in ovary between the two groups were compared; the levels of the liver and kidney function indexes were detected and the adverse reactions were recorded during the course of treatment in order to evaluate the safety of treatment.  Results:After treatment, the cyst volumes in ovary in both groups were significantly reduced compared with treatment before (P<0.05), and the reduction degree of the cyst volume in ovary in the treatment group was more obvious compared with the control group (P<0.05); the scores of dysmenorrhea in both groups were significantly decreased compared with treatment before (P<0.05), and the reduction degree of the dysmenorrhea scores in the treatment group was more obvious compared with the control group (P<0.05). No serious adverse reactions and abnormity of liver and kidney function happened in the course of treatment.  Conclusion:Bushen Huayu decoction coloclysis can effectively improve the dysmenorrhea symptom and reduce the cyst volume in ovary in patients with ovarian EMT, which has better safety.