Objective:To compare the clinical therapeutic effects of cervical cerclage and bed rest to prevent preterm delivery on pregnants with cervical insufficiency.Methods:Applying retrospective study,we collected the medical history information on 83 women diagnosised as cervical insufficiency from 2005 to 2007 in the department of gynaecology and obstetrics of our hospital.In 83 women,55 women assigned to receive cervical cerclage(A group),28 women assigned to receive bed rest(B group).Results:Preterm delievery before 34 weeks of gestation occurred in 7 of 55 women (90.90%) treated with cervical cerclage,and in 4 of 28 women (21.43%) treated with bed rest.There was significant difference in gestation age at delivery between the 2 groups.Conclusion:Cervical cerclage is an effective approach to treat cervical insufficiency and prevent preterm delivery.