Since its successful development in France in the 1980s and its successful clinical implementation, medication abortion has been applied in more than 120 countries or regions around the world, including China, and many people have chosen it because of the absence of fear in surgery, economic convenience and high success rate of abortion characteristics. However, medical abortion also has its disadvantages: “the uterine meconium cannot be completely discharged, the vaginal bleeding time is long, and the domestic clearance rate is high (the domestic clearance rate is 5% and the foreign rate is about 1 per 1,000)”. Why is the clearance rate in China significantly higher than that in foreign countries? Through a large number of clinical case studies and analysis, we found that it is related to patients’ fear and medical staff’s over-medication. If the following cases occur after a medical abortion, the uterus should be cleared: 1. ultrasound indicates the presence of intrauterine gestational sac or suspected gestational sac; 2. severe pain in the lower abdomen, and the vagina is opened to see tissue blockage in the uterus; 3. vaginal bleeding is greater than the amount of menstruation, bright red; 4. continuous vaginal bleeding for more than 21 days, and conservative treatment for one week is ineffective; 5. ultrasound indicates intrauterine tissue residue of more than 20 mm, and vaginal bleeding does not stop after more than one week of treatment or the residue increases; 5. 6.No vaginal bleeding, but ultrasound indicates blood accumulation in the uterine cavity; 7.Repeated vaginal bleeding, and the patient requests to clear the uterus. In fact, most patients with medical abortion, as long as timely follow-up, even if there is a little tissue residue, through effective combined Chinese and Western medicine treatment, vaginal bleeding will stop, and when menstruation resumes, the residue in the uterus will be discharged through the flushing of menstrual blood.