The insertion of urinary catheter in male patients is not required to be completed through surgery, and can be completed under routine conditions, including sterilization, insertion and fixation process. 1. Disinfection, the current insertion of urinary catheter mostly use disposable catheterization bag, first of all, use disposable catheterization bag of the upper layer of disinfection cotton ball disinfection once perineum area; then open the lower layer of catheterization bag, laying sterile towel sheet, again for disinfection. 2. Intubation, after checking that the urinary catheter is smooth and the anterior bladder is not ruptured, use paraffin oil to lubricate the anterior end of the urinary catheter, and then slowly insert it into the patient’s urethra, generally inserting a depth of 15-27 centimeters, and then sending it in again for 10 centimeters after seeing urine. 3. Fixation, inject 10ml of saline into the anterior bladder through a syringe to fix the urinary catheter. Ureteral intubation should be carried out by professionals, if necessary, please go to the hospital in time.