After chemotherapy for rectal cancer, patients can drink corn porridge, but they should pay attention to moderate amount so as not to cause abdominal distension, diarrhea and other symptoms. After chemotherapy for rectal cancer patients, as chemotherapy drugs can easily cause gastrointestinal adverse reactions, which may lead to vomiting, constipation, malnutrition and so on, so patients should pay attention to light, easily digestible and nutritious food in their diet. Corn porridge is a kind of light and easy-to-digest food, and corn porridge contains more fiber, so it can promote the gastrointestinal peristalsis of rectal cancer patients after chemotherapy, and has certain preventive and alleviating effects on constipation symptoms of rectal cancer patients after chemotherapy, so drinking it in moderation is beneficial to the body. It is suggested that patients should have reasonable diet and active treatment under the guidance of doctors in order to prolong the survival period.