After colon cancer surgery, patients can start to eat after the anus starts to ventilate, usually the anus starts to ventilate after 2-3 days after surgery. However, postoperative patients should eat according to the medical guidance of transitional eating and slowly resume normal diet. At 2-3 days after the operation, this time you can eat some light liquid food, such as rice soup, noodle soup and so on. If the patient recovers well, 4-5 days after surgery, you can transition to a semi-liquid diet, such as congee, soft noodles, etc. If there is no surgical complication, it can be transitioned to normal diet after another 5-7 days, but at this time, it should still focus on easy-to-digest food, to prevent food irritation to the patient’s intestinal tract. And spicy stimulating food, high fat, high salt, high sugar food should be prohibited. In addition, eating should follow the principle of small amount and multiple times, with the full recovery of gastrointestinal function, and eventually transition to a normal solid diet.