Objective To investigate the clinical efficacy of modified Wuzi Yanzong Pills combined with sequential therapy for the treatment of patients with premature ovarian failure(POF)of yang deficiency of spleen and kidney type,and to observe their effects on sex hormones and ovarian ultrasound indicators.Methods From September 2022 to September 2023,a total of 62 patients with POF of yang deficiency of spleen and kidney type who attended Huizhou Hospital of Traditional Chinese Medicine were selected as the study objects.The patients were randomly divided into the control group and the observation group by using a table of random numbers,with 31 patients in each group.The control group was treated with estrogen-progestin sequential therapy,and the observation group was treated with modified Wuzi Yanzong Pills on the basis of treatment for the control group.The two groups were treated for three menstrual cycles.Before and after treatment,the changes of serum sex hormones,uterine and ovarian ultrasonography and hemodynamic indicators,traditional Chinese medicine(TCM)syndrome scores,Kupperman score of the two groups were observed.The ovulation rate and therapeutic efficacy of the two groups were compared,and the safety of the therapeutic regimen for the two groups was evaluated.Results(1)Two cases fell off during the study period,and a total of 60 patients were eventually included in the study,of which 30 patients in each group.(2)After three menstrual cycles of treatment,the total effective rate of the observation group was 90.00％(27/30)and that of the control group was 76.67％(23/30),and the total effective rate of the observation group was significantly higher than that of the control group(P＜0.05).(3)After treatment,the serum follicle-stimulating hormone(FSH)and luteinizing hormone(LH)levels of the two groups of patients were decreased compared with those before treatment(P＜0.05),and the serum estradiol(E2)level was increased compared with that before treatment(P＜0.05),the decrease of the serum FSH and LH levels and the increase of the serum E2 level in the observational group were significantly superior to those of the control group(P＜0.01).(4)After treatment,ultrasonographic indicators such as endometrial thickness(EM),ovarian volume averaged(OVA),mean ovarian diameter(MOD)at the maximum transverse section of the ovary,and antral follicle count(AFC)in the two groups were increased compared with those before treatment(P＜0.05),and the increase in the observation group was significantly superior to that in the control group(P＜0.01).(5)After treatment,the peak systolic velocity(PSV)of the two groups was increased compared with that before treatment(P＜0.05),and the ovarian resistance index(RI)and ovarian pulsatility index(PI)were decreased compared with those before treatment(P＜0.05),and the increase of PSV and the decrease of RI and the PI in the observation group were significantly superior to those of the control group(P＜0.01).(6)After treatment,the Kupperman score and TCM syndrome scores of the two groups were decreased compared with those before treatment(P＜0.05),and the decrease in the observation group was significantly superior to that in the control group(P＜0.01).(7)After three menstrual cycles of treatment,the ovulation rate of the observation group was 30.00％(9/30),and that of the control group was 10.00％(3/30).The comparison between the two groups showed that the ovulation rate of the observation group was significantly superior to that of the control group(P＜0.05).(8)The incidence of adverse reactions in the control group was 6.67％(2/30)and that in the observation group was 6.67％(2/30).The comparison between the two groups showed that there being no statistically significant difference(P＞0.05).Conclusion The modified Wuzi Yanzong Pills combined with estrogen-progestin sequential therapy can effectively regulate the sex hormone levels of patients with POF of yang deficiency of spleen and kidney type,promote the follicular development,significantly improve the ovarian microcirculation,increase the ovulation rate,and relieve symptoms and signs,with good safety.