The process of urinary catheterization for female patients includes explaining the purpose of urinary catheterization and precautions to the patient, making preparations for urinary catheterization, helping the patient to disinfect the catheterization, and finally needing to carry out post-catheterization treatment. 1. Explain the purpose of urinary catheterization to the patient and her family, and explain the various precautions in the process of urinary catheterization; 2. Prepare sterilized items for the catheterization process, and select the appropriate type of catheter according to the situation; 3. Strict implementation of aseptic operation should be carried out in the process of urinary catheterization, wear a good mask and hat before catheterization, and do a good job of strict hand disinfection. 4. During urinary catheterization, the patient should take a flat lying position, with both knees flexed and both hips adducted to fully reveal the vulva. Wear good film gloves, padded center sheet, perineum for the first cleaning. Then wear sterile gloves, disinfect the perineum for the second time and spread the sterile towel; 5. start urinary catheterization with the left hand to separate the labia minora to reveal the vaginal vestibule, will be prepared sterile catheter from the urethra external orifice inserted into the urethra, generally inserted into the urethra about 5cm can have urine outflow, and then the urethra of the air bag injected with saline 10ml, the urethra will be fixed, and finally the external drainage bag. 6. Do a good job of catheterization time marking, do a good job after the operation of medical waste disposal, and finally to the patient and his family to explain to the indwelling urinary catheter precautions and nursing care. To summarize, if you need to catheterize urine, you should do it under the guidance of professional doctors.