Objective To analyze the MRI and ultrasonographic findings of cesarean scar pregnancy and to evaluate the diagnostic value. Methods The clinical data of 44 cases of patients with cesarean scar pregnancy confirmed by surgery and pathology in our hospital were retrospectively analyzed. All patients completed CT and MRI examination and the imaging data were complete. Results In the 44 cases of patients with cesarean scar pregnancy, 34 cases were detected by transvaginal ultrasonography and the accuracy rate was 77.27%. Among them, there were 19 cases detected of simple gestational sac type, 15 cases of heterogeneous mass type, 10 cases misdiagnosed and 4 cases misdiagnosed as cervical pregnancy and 6 cases misdiagnosed as intrauterine pregnancy; MRI detected that there were 43 cases of cesarean scar pregnancy and the accuracy rate was 97.73%. There were 27 cases of simple gestational sac type, 1 cases of missed diagnosis and 15 cases of heterogeneous mass type detected. The detection rate of MRI in simple gestational sac type and general diagnostic coincidence rate were higher than those of transvaginal ultrasonography (P<0.05). Conclusion In the clinical diagnosis of patients with cesarean scar pregnancy, to adopt MRI, the diagnostic accuracy rate is higher than that of transvaginal ultrasonography. MRI can be taken as an auxiliary means of transvaginal ultrasonography in diagnosis.