Objective:To analyze the risk factors for adverse perinatal outcomes of twins. Methods:The 251 cases of twin pregnancy in obstetric unit of Chongqing Health Center for Women and Children from January 1 2013 to December 31 2013 were enrolled in the retrospective study. Results:(1)The incidence of adverse perinatal outcomes of twins in the hospital was approximately 34.66%. The incidence of perinatal death was 8.37%.Single factor analysis:there were significant differences in fertilization way,chorionicity,preterm premature rupture of membranes,gestational diabetes(P<0.05). (3)Logistic regression analysis:cescarean section is a protec-tive factors for perinatal outcomes of twins(P=0.000,OR=0.086,95%CI=0.023 to 0.321). Preterm premature rupture of membranes(PPROM) and monochrionic twins are risk factors for adverse perinatal outcome(P=0.010,OR=2.979;P=0.043,OR=5.689). Con-clusion:PPROM,monochorionic are the main risk factors for adverse perinatal twins while cesarean section is the protective factor.