Urinary catheterization for men’s surgery usually does not require an incision. Inserting a urinary catheter before men’s surgery is inserted from the urethra, mainly to drain urine and avoid urinary retention caused by the surgery, and this process does not require an incision. Before inserting the urinary catheter, the male patient lies flat on the bed, and the professional doctor uses iodophor to carry out local disinfection, including the perineum, scrotum, penis, glans and other parts. After completing the disinfection, the catheter is first coated with lubricant, and then the catheter is gently inserted into the urethral orifice with tweezers, and sent inward for about 20cm, and urine is seen to flow out, indicating that it has entered the bladder, and then sent into the month for 1~3cm injected into the water bladder for fixation, and connected to a drainage bag for the drainage of urine. After a man’s surgery to insert a urinary catheter, it is necessary to clean the perineum as well as the bladder in a timely manner according to medical advice, so as to avoid local infection. When the catheter needs to be pulled out, it should be standardized by a professional doctor in asepsis, and must not be pulled out by yourself.