Objective To compare the caesarean scar pregnancy abdominal ultrasound,transvaginal ultra-sound and abdominal combined transvaginal ultrasound ultrasonic imaging features and diagnostic results,to explore the diagnosis value of different methods.Methods All 22 case with cesarean scar pregnancy ultrasound through three ways were selected,and the ultrasonic features and diagnostic rate of different methods were compared.Results Abdominal ultrasound diagnosis rate was 40.91%,transvaginal ultrasound diagnosis rate was 81.82%,combining ultrasound diagnosis rate was 95.45%,and the three methods of inspection diagnosis rate differences were statistically significant(χ2 =17.88,P <0.05).Conclusion Transvaginal ultrasound in the diagnosis of cesarean scar pregnancy has important value,combining ultrasound examination can further improve the diagnosis rate.