A catheter kit is prepared for the insertion of a catheter and contains the necessary items for the insertion of a catheter. The kit includes a catheter, syringe, disposable lubricant, and disposable gloves. When a patient has urinary retention or is unable to urinate on his or her own, he or she should be catheterized in a timely manner. When catheterizing, you must be gentle, find the urethral opening, and then slowly insert the catheter into the urethra to enter the bladder before draining the urine from the bladder in time, which can improve the patient’s specific situation.