The correct way to insert a catheter for women is to disinfect the urethral opening, insert the catheter and fix the catheter. 1. Disinfecting the urethral opening: the patient lies flat on the bed, legs apart, the professional doctor puts on sterile gloves to disinfect the pubic mound, labia minora, labia majora and the urethral opening, opens the catheterization bag, pours disinfectant into a medicine cup to soak a cotton ball, then lubricates the anterior part of the catheter with a paraffin cotton ball. 2. Insert the catheter: Disinfect the urethral opening once again, then use another hemostatic forceps to hold the catheter against the urethral opening and insert it into the urethra for about 4 to 6 centimeters, and then insert it for about 1 to 2 centimeters after seeing the urine, and fix the catheter to introduce the urine into the curved disk. 3. Fixed catheter: Finally, use a syringe to inject 2 ml of saline, after the completion of the external displacement of 1 to 2 centimeters to connect the drainage tube, the entire catheterization process is complete. It is recommended that female patients insert the catheter under the guidance of the doctor, do not do strenuous exercise after completing the catheterization to avoid catheter deviation.