The functions of indwelling urinary catheter after prostatic hyperplasia electrolysis include drainage of urine to prevent infection, promotion of wound healing, and prevention of postoperative urethral stricture. 1. Drainage of urine and prevention of infection: patients need to rest in bed after prostatectomy, during this period, the patient discharges urine through the urinary catheter, at the same time, the catheter can also prevent the urine from direct contact with the wound, reducing the chance of wound infection. 2. Promote wound healing: prostatectomy will remove part of the prostate tissue, and after leaving a catheter, it can promote postoperative wound healing of the bladder neck and urethra. 3. Prevent postoperative urethral stenosis: The tissue at the prostate wound will undergo a healing reaction after the operation, which will supplement the excised prostate tissue through the growth of granulation tissue, and the presence of a urinary catheter can prevent urethral stenosis caused by the overgrowth of granulation tissue. The patient is left with a urinary catheter after prostate enlargement electrocision, which needs to be removed by a professional physician according to the individual’s judgment.