Insertion of catheter in women is a kind of procedure that is commonly done in clinical practice and needs to be carried out according to the standard procedure, which mainly includes preoperative preparation, local disinfection, and insertion of catheter. 1. Preoperative preparation: the patient lies flat on the examination bed, exposing the vulva as much as possible. 2. Local disinfection: the vulva is disinfected, from the inside out, expanding to 15 cm, and a cavity towel is spread after disinfection. 3. Insert the catheter: dip the head of the catheter into paraffin oil, separate the labia with one hand to expose the urethral opening, and insert the catheter into the urethra with the other hand before the operation, and continue to insert it for 1~2 cm after urine outflow is found; use a syringe to inject saline into the balloon in the amount of 10~15 ml to fix the catheter. Indwelling urinary catheterization should be completed by professional medical personnel, postoperative local pain and bleeding, the need for timely medical observation, diagnosis of the condition under the guidance of the clinician to carry out standardized treatment, to avoid causing delays in the condition.