Once an incomplete abortion has been diagnosed, a second removal should be performed as soon as possible. The specific time of the second purging is related to the time when the incomplete abortion is clarified. Generally in half a month after the abortion review ultrasound shows that there are abnormal abnormal echoes of the uterine cavity can only be diagnosed as residual. If the drug abortion is complete, there is no need for a second clearance; if there is residue in the uterine cavity after the drug abortion, the second clearance is required as soon as possible, and the earlier the better. Generally need to review the ultrasound after the drug abortion, when the residual tissue in the uterine cavity more than 1cm, then need to immediately clear the uterus. Because the residual time is too long can lead to embryonic residues in the uterine cavity in the mechanization, increase the incidence of intrauterine infection, and will increase the difficulty of surgical operation of the second removal, intraoperative bleeding is also more, and even lead to anemia, hemorrhagic shock. In addition, if the residue is closely adhered to the uterine wall, it is also a kind of damage to the uterus. Generally, if the residue is less than 1cm, patients can take oral Chinese medicine biochemical soup, and most of them can be discharged after menstruation resumes. After the second hysterectomy, it is recommended to carry out anti-inflammatory treatment in time, pay attention to rest, maintain a relaxed mood, avoid eating cold and irritating food, and at the same time prohibit sexual intercourse and pelvic baths within one month after the operation.