To observe the effects of Tiaomo Decoction（调膜汤）combined with pelvic floor electric stimulation on endometrial thickness，endometrial shape and endometrial blood flow in patients with kidney deficiency and blood stasis syndrome of thin endometrial，and to evaluate its curative effect on thin endometrial.

A total of 90 patients with thin endometrium who were admitted to the Obstetrics and Gynecology Clinic of Affiliated Hospital of Liaoning University of Traditional Chinese Medicine from October 2022 to October 2023 were selected and included into the control group，observation group 1 and observation group 2 according to their treatment intention，with 30 cases in each group. The control group was given low-dose aspirin orally during non-menstrual period，the observation group 1 was given Tiaomo Decoction orally from the first to the 28th day of menstruation on the basis of the control group，and the observation group 2 was given pelvic floor bioelectric stimulation treatment during non-menstrual period on the basis of observation group 1. One menstrual cycle was 1 course of treatment. After 3 courses of treatment，menstrual blood volume，traditional Chinese medicine（TCM）syndrome score，endometrial thickness，endometrial morphology and endometrial blood flow index were compared before and after treatment.

The total effective rate of the observation group 1 and 2 was better than that of the control group（P<0.05）. After treatment，the blood volume score，TCM syndrome score，intima thickness and type and hemodynamics of the observation group 1 and 2 were significantly improved compared with those before treatment（P<0.05），and the efficacy was better than that of control group（P<0.05）. The intima thickness，intima type A rate，blood flow pulsation index and blood flow resistance index of the observation group 2 were more significant than those of the observation group 1（P<0.05）.

Based on the therapeutic theory of“invigorating kidney Qi and regulating cell pulse”，Tiaomo Decoction combined with pelvic floor electrical stimulation can increase the menstrual blood volume of patients，improve the clinical symptoms，increase the endometrial thickness and the proportion of type A endometrial by improving the uterine blood microcirculation，induce endometrial growth and improve the receptivity of thin endometrial.