A urinary catheter for women is inserted inside the bladder to draw urine out. The doctor should first sterilize the urethral opening and perineal area of the woman during the operation. When disinfection is complete, lay a sterile operating sheet, open the sterile catheterization kit, use forceps to clip the front end of the catheter, separate the labia minora to expose the urethral opening, hold the catheter coated with sterile liquid paraffin in the right hand and slowly insert it into the urethra. The opening at the end of the catheter is placed in a sterilized curved tray, and after inserting about 6 to 8 cm into the urethra, the hemostatic forceps are loosened, and when urine is seen to flow out, it is inserted about 2 cm further. You need to drink a lot of water during the insertion of urinary catheter, otherwise it is easy to cause cloudy urine, block the urinary catheter or lead to the concentration of urine, causing the upper layer of the urinary catheter crystallization. Girls need regular urethral disinfection during urethral insertion, using iodophor to disinfect the external urethral opening twice a day. It is also necessary to maintain local hygiene of the vulva to avoid infection.