Female catheterization requires adequate disinfection because the female urethra is steep and straight and prone to secondary retrograde bacterial infection, so there are certain steps and sequences in disinfection. The physician should wear gloves and apply forceps, clamps, iodophor, and cotton balls to perform initial vulvar disinfection, in the order of suprapubic area, mons pubis, labia majora, and labia minora, with the direction of disinfection being from the outside to the inside, from top to bottom. The labia majora is disinfected first, then the labia minora, and the direction of disinfection is in clockwise concentric circles, gradually from outside to inside. After the first disinfection, the second disinfection should be carried out, and generally the disinfection should be carried out three times. After the disinfection, the catheter bag should be opened and the catheter lubricated, and paraffin cotton balls can be lubricated at the front end of the catheter, and then enter the urethral opening, and the indwelling airbag can complete the catheterization.