Bowel cancer diet taboos should pay attention to several aspects so that it will be conducive to the healing of the disease. The diet of rectal cancer patients should be diversified, not partial and not picky, do not consume high-fat and high-protein diet for a long time, and often eat fresh vegetables rich in vitamins and cancer prevention foods. Such as tomatoes, dark green and cruciferous vegetables (celery, coriander, kale, mustard, radish, etc.), soy products, citrus fruits, malt and cereal, onion, garlic, ginger, yogurt, etc. Rectal cancer diet taboos: 1. Patients with rectal cancer have recurrent and persistent diarrhea and weak digestive capacity, so they should be given food that is easy to digest and absorb. 2.Patients with rectal cancer mostly have blood in stool, and late stage patients often have a lot of blood in stool, so they should take less or no stimulating and spicy food. 3.Patients with prolonged diarrhea or advanced patients have long term fever, sweating and damage to fluid, so it is appropriate to drink more water or soup, and the main food can be mainly semi-liquid diet such as porridge and noodles. 4.Patients mostly have symptoms such as loss of appetite, nausea and even vomiting, so it is appropriate to take light diet and avoid greasy. 5.Patients with advanced rectal cancer have long diarrhea, blood in stool, fever, a lot of nutrients and water loss, body wasting, weight loss, loss of gas and blood, it is appropriate to take nutritious tonic juice diet. According to the above recommendations of rectal cancer diet taboos and doctors’ treatment, rectal cancer patients can get better results.