Bladder cancer is a common urological tumor in China, its development is related to long-term smoking and exposure to chemical substances. Postoperative nutritional support should be strengthened to facilitate disease recovery, and the specific dietary principles are as follows: 1. Appropriate supplementation of lean chicken, duck, fish, egg and milk and other high-protein foods is beneficial to patients’ nutritional support; 2. More fruits and vegetables rich in vitamins and fiber, such as oranges, apples, celery and lettuce, are beneficial to patients’ physical recovery and reduce complications such as constipation and intestinal obstruction.