The operation procedure of indwelling urinary catheter for male includes placing suitable position, disinfection, lubrication, fixation and observation. 1. Putting the patient in the proper position: put on the sterile bed sheet, the patient lies flat, take down the pants below the knees, and expose the urethral opening completely. 2. Disinfection: Disinfect the urethral opening and surrounding skin with iodophor. 3. Lubrication: Apply lubricant to the urethra before insertion in order to reduce the patient’s pain and reduce the friction between the urethra and the urethra. 4. Fixation: Insert the urethra into the urethra until the front end of the urethra enters the bladder, gently press the lower abdomen appropriately, and inject 10-15mL of saline to fill the bladder of the urethra and fix the urethra after there is a flow of urine. 5. Observation: After inserting the urinary catheter, you can observe whether the patient has any discomfort, the color of urine and the amount of urine. Male indwelling urinary catheter should be in regular hospitals, completed by professional medical staff.