Objective: This paper expounds and analyzes the effect of cluster nursing in preventing urinary tract infection in postoperative patients with indwelling urinary catheter. Methods: A total of 400 postoperative patients with indwelling urinary catheter, treated in Yancheng No. 1 People’s Hospital in recent two years, were recruited as research subjects. The patients were equally divided into group A and group B, with 200 patients in each group, and all received routine anti-infectives. The patients in group A (200 cases) received routine nursing. On the basis of group A, cluster nursing was implemented for patients in group B (200 cases). Results: The indwelling time of urinary catheter, the disappearance time of bladder irritation symptoms, and the probability of urinary tract infection were compared between both groups, which showed that the nursing effect of group B was better than that of group A (P < 0.05). Conclusion: The implementation of cluster nursing in postoperative patients with indwelling urinary catheter can improve the deficiency of routine nursing, consolidate the treatment effect, and reduce the complication rate of urinary tract infection.