Objective: To investigate the clinical value of B-scan ultrasonography in monitoring intrauterine operations on malformed uteruses. Methods: 196 cases that were diagnosed with malformed uteruses by 3-D transvaginal ultrasonography and underwent intrauterine operations under the monitoring of B-scan ultrasonography from January 2006 to December 2015 in Affiliated Hospital of North Sichuan Medical College were analyzed retrospectively and the clinical data were input into an Excel spreadsheet for statistics. Results: (1) All the 196 cases were preoperatively diagnosed by 3-D transvaginal ultrasonography, 195 of whom were confirmed with malformed uteruses during the operation while one was found to be misdiagnosed, with the accuracy of 99.5% (195/196); (2) 162 underwent suction curettage for early pregnancy, 9 had induced labor or