From June 2004 to September 2009, 90 patients with T2a to T4a bladder tumors underwent radical cystectomy plus T-type in situ ileal neobladder reconstruction with creatinine measurement, ultrasound, cystography, intravenous urography or enhanced CT for upper urinary tract function, and patients were followed up with urodynamic evaluation of urinary control. Cystography was performed before removal of the catheter 3 weeks after surgery, and no significant contrast spillage was found. 4 cases (4.44％) showed clear input collaterals, but the ureter was not shown, and no reflux was seen in all other cases. Ultrasound, intravenous pyelogram or CT examination of the upper urinary tract suggested mild temporary dilatation of the renal pelvis and ureter bilaterally in 18 patients (20%) within 45 days after surgery, and one case (1.11％) showed postoperative transient renal insufficiency with creatinine up to 5.7 mg/dl, but the pelvic ureter returned to normal form during follow-up; four cases (4.44％) xFF05;) developed mild bilateral pelvic ureteral dilatation 3 years after surgery, but renal function remained normal; other patients had blood urea nitrogen and creatinine within the normal range. The patients achieved complete daytime urinary control rate of 94.44％ (85/90), 5.55 (5/90) satisfactory, with a satisfaction rate of 100％; nighttime urinary control rate of 41.11％ (37/90), satisfactory 41.11％ (37/90), unsatisfactory 17.78％ (16/ 90), with a satisfaction rate of 82.22％. Urodynamic results showed a mean end perfusion pressure of 16.11 ± 9.53 cmH2O and a maximum bladder volume of 316.20 ± 95.63 ml; a ventral voiding pattern with a maximum pressure of 86.67 ± 25.17 cmH2O, a mean maximum urinary flow rate of 17.44 ± 9.83 ml/s and a residual urine volume of 32.60 ± 29.40 ml. T The anti-reflux effect of the in situ neobladder input collaterals was satisfactory and adequately protected the upper urinary tract function; the neobladder had good compliance and the patient’s urinary control ability, urinary flow rate and residual urine volume were also satisfactory.