Objective To analyze the influencing factors and effects of uterine artery embolization (UAE) on the type Ⅰ cesarean scar pregnancy (CSP) treatment. Methods Clinical data of 42 cases with type Ⅰ cesarean scar pregnancy were retrospectively analyzed. According to different treatment methods, patients were divided into UAE group (19 cases) and control group (23 cases). The sonographic features, the level of hCG in blood before operation and the operation complications in the two groups between the two groups were compared. Results There were significant differences between thickness of residual muscle layer, blood supply and the location of pregnancy tissue (P < 0.05). Logistic regression Analysis indicated that blood supply (Ol ^ R = 27.208, 95% CI: 1.744, 424.451) and the location of pregnancy tissue (Ol ^ R = 11.120, 95% CI: 1.698, 72.811) are independent factors in the treatment of type Ⅰ CSP. The UAE group all had different degree of embolism sydrome. The incidence of long-term menstrual volume reduction in the intervention group was higher than that in the non intervention group (P < 0.05). Conclusion The CSP treated by the UAE can effectively prevent massive hemorrhage. In type ⅠCSP, UAE could be carefully chosen according to the blood supply and the location of pregnancy tissue to reduce complications.