General anesthesia is generally required to insert a urinary catheter. Because under general anesthesia the patient’s bladder has no independent urinary function, a catheter is needed to help the urine drain smoothly. It can also understand the patient’s urination and kidney function. Aseptic operation should be strictly observed when inserting the catheter to avoid urinary tract infection. The main reason for inserting urinary catheter in general anesthesia surgery is to catheterize the patient, and the urine color and volume can be observed during and after the operation, as well as intraoperative supervision and monitoring. In addition, the urine can be collected during the operation to assess the need for rehydration and the patient’s vital signs, and finally to determine whether ischemia, so as to carry out appropriate treatment. When inserting a urinary catheter under general anesthesia, doctors are careful to strictly observe aseptic operation to prevent urinary tract infection.