Abstract： Objectives To evaluate the effects of sonographic urodynamics on diagnosis and TVT-O procedure for the treatment of stress urinary incontinence (SUI).Methods Sonographic urodynamics were performed in 41 cases of SUI.The parameters of Valsalva abdominal leak -point pressure (ALPP) and urethrovesical junction mobility ( UVJ-M) were measured with the standardized method.According to the two parameters,41 cases of SUI were performed classification and some of them were made TVT-O procedure.Results 7 cases were type A,UVJ-M ≤ 1.5cm with ALPP ＞ 55cmH2O.11 cases were type B,UVJ-M ＞ 1.5cm with ALPP ＞ 55cmH2O.10 cases were type C,UVJ-M≤1.5cm with ALPP≤55cmH2O.13 cases were type D,UVJ-M ＞ 1.5cm with ALPP≤55cmH2O.Of the 41 cases,26 underwent TVT-O operation.All of them were followed up for 3 ～ 29 months (mean,11 months).24 cases were cured and 2 were improved.Conclusions Sonographic urodynamis are important to the morphologic and functional diagnosis of SUI,and are indicative for choice of TVT-O procedure for SUI.