After the colonoscopy, you need to eat light diet or fasting according to the specific situation of the colonoscopy. 1. Simple examination: patients with simple examination should pay attention to eat light food within 24 hours, such as rice porridge, vegetable porridge, soft noodles, etc., and eat less hard food. 24 hours later, they can eat eggs, bread, fruits, etc. to replenish nutrients and promote recovery. 2. Intestinal damage examination: If patients undergo biopsy, hemostasis, intestinal polyp resection and other intestinal damage examination, generally patients need to fast for 12 hours, and within 24 hours, they need to eat semi-liquid diet such as rice porridge, and they can’t eat hard and multi-fiber food. Within three days, patients should pay attention to light diet, avoid eating hard and multi-fiber food. After three days, you can eat eggs, bread, fruit and other foods. After the colonoscopy patients should follow the doctor’s instructions, abnormal reactions to communicate with the doctor in a timely manner to avoid serious consequences.