Abstract: Cervical insufficiency is one of the leading causes of middle-late stage abortion and premature birth. Cervical cerclage may be the main operation method to treat and the effect has been the hot topic for the scholars both at home and abroad. Emergency cervical cerclage is in order to prolong the immature fetal gestational age under the emergency circumstances. But it remains controversial in single or multiple pregnancy, choosing of operation type, the delivery method , the treating of complications , the management of peri-operative and pregnancy outcome. We want to discuss the application value of the emergency cerclage and provide the treatment basis for the clinical in this paper.