Abstract: Objective: To explore the related risk factors of ectopic pregnancy in nonparous women. Methods: Univariate analysis and unconditional multitivariate Logistic regression analysis are conducted on 75 nonporous cases with ectopic pregnancy and 150 nonporous cases with intrauterine early pregnancy from outpartient in the same time. Results: Cultural degree, drug abortion, artificital abortion, reproductive tract infection history, pelvic surgeries, number of sex partners, contraceptive methods seven factors caused the occurrence of nonporous ectopic pregnancy significant differences comparing with the control group (P < 0.05-P < 0.01). OR value of reproductive tract infection history, drug abortion, pelvic surgeries was greater than 1,by unconditional multitivariate Logistic regression analysis. Conclusions: Reproductive tract infection history, drug abortion, pelvic surgeries and so on are the main risk factors of ectopic pregnancy in nonparous women.