Objective Analyze the quality of preoperative ultrasound report for ovarian torsion. Explore the improvement of diagnostic mode to increase the diagnostic sensitivity. Methods One hundred and fifty-one patients operatively diagnosed with ovarian torsion were collected in our hospital.The clinical data，pathological results，and conventional ultrasound findings of all the patients were retrospectively analyzed. The lesion detection rate of the ultrasound，the description quality of the reports，and the diagnostic accuracy of preoperative ultrasound were assessed. The diagnostic accuracy was compared between the resident group and the attending and above physicians group. The diagnostic sensitivity of the triad of abdominal pain，local tenderness and adnexal mass in ovarian torsion was evaluated. Results Of the 151 patients

134 （88.74%） patients had acute abdominal pain，15 （9.94%） patients had intermittent dull pain，and 2 （1.32%） patients had no abdominal ache.92 （60.93%） cases had nausea with or without vomiting. All patients had 90 °~1440 °unilateral ovarian torsion. There were 2(1.32%) cases of simple ovarian torsion and 149(98.68%) cases of secondary ovarian torsion. The postoperative pathology was mainly mature teratoma （31.13%） and cystadenoma （24.50%）. The lesion detection rate of ultrasound was 99.34% （150/151）.The description integrity rate of the reports was 100% （150/150）.The diagnostic accuracy of preoperative ultrasound was 9.93% （15/151）.Separately，the diagnostic accuracy of the resident group was 6.02% （8/133），and the diagnostic accuracy of attending and above physicians group was 38.89% （7/18）. The difference between groups was statistically significant （P ＜ 0.001）. Local tenderness point could be touched in three cases by transvaginal ultrasound. Whirlpool sign was detected in seven cases.The diagnostic sensitivity of the triad of abdominal pain，local tenderness，and adnexal mass were 98.0% （148/151）. Conclusions Based on the triad of abdominal pain，local tenderness and a pelvic mass，accompanied by characteristic ultrasonic manifestations and other clinical symptoms，such as nausea and vomiting，it is expected to achieve timely diagnosis and treatment of ovarian torsion，maximize the preservation of ovarian function