The patient’s own miscarriage is a spontaneous miscarriage, and whether a patient who has a spontaneous miscarriage needs to be cleared or not needs to be decided according to his or her condition. Spontaneous miscarriage is divided into incomplete miscarriage and complete miscarriage. If the patient has a complete miscarriage on ultrasound, i.e. there is no residue or blood clot in the uterine cavity and there are no signs of infection, then the procedure does not need to be performed. However, if there are residues of placenta and membranes in the uterine cavity, especially if the patient has symptoms of heavy vaginal bleeding, the abortion is incomplete and needs to be treated with timely curettage and antibiotics to prevent infection to avoid dangerous situations such as hemorrhage and hemorrhagic shock, which can cause serious health effects. If the patient has miscarriage combined with infection, broad-spectrum antibiotics should be chosen for 2-3 days orally in mild cases, and intravenous antibiotics should be administered in severe cases, and the appropriate time should be chosen to perform the purging procedure after the infection is controlled.