The correct method of urinary catheterization for men mainly includes preoperative preparation, local disinfection, catheterization, postoperative treatment and other steps. 1. Preoperative preparation: first of all, we should prepare the disinfection supplies, appropriate urinary catheter, and inform the patient of the purpose of urinary catheterization. 2. Local disinfection: the patient should be placed in the supine position, exposing the perineum, the operator wears gloves, opens the catheterization bag, disinfects the urethral opening and the surrounding skin, and then replaces the sterile gloves and disinfects the urethral opening and the surrounding skin again. 3. Intubation: connect the catheter to the bag, apply lubricant, expose the urethral opening, insert the catheter to see urine and then insert it for 2~5 cm, then inject 10 ml of water into the balloon, disinfect the urethral opening again and reset the foreskin. 4. Postoperative treatment: remove the hole towel, organize supplies, and place the patient. Insertion of urinary catheter should go to the regular hospital in time and find a professional doctor to carry out. There may be some discomfort during the catheterization process, you should pay attention to relax and cooperate with the doctor’s operation so that the urinary catheter can be introduced more smoothly.