Abstract: Cervical incompetence is an important factor of the late inevitable abortion and preterm birth, and the cervical cerclage has been used for many years to treat cervical incompetence. The modified transvaginal cervicoisthmic cerclage is a promising and safe technique for improving obstetric outcomes in women with cervical insufficiency, and avoid the requirement of repeated transabdominal operation. The operation indication, technique, opportunity and complication were described in this paper.