Abstract:〔Abstract〕 Objective To investigate the clinical efficacy of Shenling Baizhu Powder in the prevention and treatment of ovarian hyperstimulation syndrome (OHSS), and to provide reliable evidence for clinical practice. Methods 82 patients with OHSS enrolled from Fogang County Maternal and Child Health and Family Planning Service Center from January 2019 to January 2021 were randomly divided into control group and observation group, with 41 cases in each group. Patients in the control group were encouraged to increase fl uid intake and their abdominal circumference, urine volume and body mass were measured during the study process. Patients in the observation group were treated in the control group in the foundation, given Shenling Baizhu Powder. The incidence of OHSS, the number of oocyte retrieval, the number of embryos obtained, the E2 level of HCG day, cycle cancellation rate, clinical pregnancy rate, abortion rate and safety evaluation were compared between the two groups. Results After treatment,there was no signifi cant difference in the number of embryos obtained between the two groups (P > 0.05). Compared with the control group, the E2 level of HCG day in the observation group was lower, and the number of oocyte retrieval was less, and the difference were signifi cant (P < 0.05). In terms of the fresh embryo transplantation cycle cancellation rate, no signifi cant difference was detected between the two groups (P > 0.05), while the total incidence of OHSS and clinical abortion rate in the observation group were lower than that in the control group, and the clinical pregnancy rate was higher in the observation group, with signifi cant difference (P < 0.05). No liver and kidney damage or adverse events occurred during the treatment period between the two groups. Conclusion Shenling Baizhu Powder was a promising strategy to prevent OHSS with the reassuring evidence of reducing the incidence of OHSS, and effectively increasing the pregnancy rate and reduce the abortion rate.