ABSTRACT Objective To explore the relationship between cystocele and stress urinary incontinence in women by ultrasonography. Methods From April 2016 to April 2018, 90 patients with cystocele complicated with SUI treated in our hospital were set as the cystocele+SUI group. In the same period, 90 patients with cystocele who came to our hospital were set as the cystocele group (without SUI). During the same period, 95 female patients who came to our hospital for physical examination were set as the control group (no urinary system disease). Two - dimensional ultrasound examination of pelvic floor was performed by perineum in each group. The ultrasound parameters of each group were compared, and the bladder prolapse was classified according to the results of two-dimensional ultrasound. The ultrasound parameters of patients with cystocele of different types were compared. Results In both the cystocele+SUI group and the cystocele group, the posterior cystourethral Angle (PUA), the descending value of bladder neck (BND), the descending value of the lowest point of the posterior wall of the bladder and the rotation Angle of the urethra were significantly higher than those in the control group, with statistically significant differences (P<0.01). In the cystocele+SUI group, the lowest point of the posterior wall of the bladder and the rotation Angle of the urethra were significantly lower than those in the cystocele group, with statistically significant differences (P<0.01). In the cystocele+SUI group, type I and II cystocele dominated. The PUA of patients with type I and type II cystocele was significantly higher than that of type III, the lowest point of the posterior wall of the bladder and the rotation Angle of the urethra were significantly lower than that of type III, and the differences were statistically significant (P<0.01). Conclusion Two-dimensional pelvic floor ultrasound can be used to evaluate and analyze cystocele and its different types. Cystocele in SUI patients is mainly cystourethrocele, and the main ultrasonic manifestations are enlargement of the posterior Angle of cystourethra and formation of the bladder neck funnel.