Objective To investigate the characteristics of transvaginal color Doppler ultrasound in ovarian corpus luteum cysts.Methods A total of 120 patients with ovarian corpus luteum cysts diagnosed in our hospital from September 2019 to September 2023 were collected and confirmed by follow-up ultrasound and surgical pathology.Results The accuracy rate was 100%in 62 cases of common corpus luteum cysts,100%in 26 cases of pregnancy corpus luteum cysts,100%in 22 cases of hemorrhagic corpus luteum cysts,75%in 8 cases of corpus luteum cyst rupture,and 2 cases were misdiagnosed.Conclusion The transvaginal color Doppler sonography of ovarian corpus luteum cysts has characteristic performance and a high diagnostic value.The diagnosis based on atypical sonography is still difficult,and must be combined with clinical manifestations.