Patients with advanced rectal cancer should pay attention to the following points in their diet: 1. They should mainly take a light diet and eat more vegetables, fruits and other foods rich in vitamins, which can promote the peristalsis of the gastrointestinal tract and help to relieve the symptoms. 2. They should avoid overeating, eat less and more meals, and avoid spicy and stimulating foods, such as chili and garlic, because dry stools can aggravate the symptoms of rectal cancer, and by the same token they should Patients with advanced rectal cancer should eat more easily digestible food, because patients with advanced rectal cancer have narrow intestinal cavity and are prone to incomplete intestinal obstruction. 4. Patients with advanced rectal cancer should appropriately supplement foods with high protein content, such as eggs, fish and shrimp, milk, etc.