Objective:TO investigate and analyze whether endometriosis wil result in ectopic gestation.Methods:Select 155 patients with ectopic pregnancy,statistical analysis of the clinical data of these patients.Results:In 155 patients,18 patients with endometriosis(11.61%);58 patients with a history of operations of uterine cavity(37.42%);8 patients with a history of abdominal operation(5.16%).Conclusion:Endometriosis wil increased risk of ectopic pregnancy.Early detection and treatment of endometriosis can reduced risk of ectopic pregnancy.Endometriosis and ectopic pregnancy have high correlation.