Abstract： Objective： To observe the curative effect of Baotailing capsules combined with phloroglucinol injection for threatened abortion with kidney deficiency syndrome and its effect on pregnancy outcome. Methods：A total of 104 cases of patients with threatened abortion of kidney deficiency syndrome were enrolled and divided into the observation group and the control group according to the random number table method，52 cases in each group. Both groups were given phloroglucinol injection， and the observation group was additionally treated with Baotailing capsules. Both groups were given two- week treatment and two-week follow-up. Clinical effect and pregnancy rate were compared between the two groups. Before and after two- week treatment， score of main symptoms of kidney deficiency syndrome was evaluated， and levels of sex hormone [serum progesterone(P)， human chorionic gonadotropin(HCG)， estradiol(E2)] were detected. Results： After treatment， the total effective rate in the observation group was higher than that in the control group(P＜0.05). Scores of vaginal bleeding，bearing-down pain of lower abdomen，aching pain of lower back，and soreness and weakness of knees in the two groups were decreased when compared with those before treatment(P＜0.01)，and the four symptom scores in the observation group were lower than those in the control group(P＜0.01). Levels of P，HCG，and E2 in serum in the two groups were increased when compared with those before treatment(P＜0.01)， and the above levels in serum in the observation group were higher than those in the control group(P＜0.01). During two-week follow-up，the normal pregnancy rate in the observation group was higher than that in the control group(P＜0.05). Conclusion： In the treatment of threatened abortion with kidney deficiency syndrome，the therapy of Baotailing capsules combined with phloroglucinol injection can enhance the clinical effect，promote the remission of clinical symptoms and the improvement of sex hormone levels，and improve normal pregnancy rate.