If it is a general examination, you can usually eat light food such as millet porridge within 2-4 hours after the colonoscopy. If you are doing colonoscopy for polypectomy without abdominal pain and other uncomfortable symptoms, you can generally eat food such as noodle soup after 12 hours. 1. Enteroscopy is safer, if you just do the colonoscopy for inspection, it may cause intestinal mucosal damage, generally you can eat within 2-4 hours after the inspection, pay attention to light diet, you can eat millet porridge, white porridge and other light and easy-to-digest food, avoid hard rice and other hard and difficult-to-digest food, so as not to cause mucosal damage. 2. If you are doing colonoscopic polypectomy, there will be some trauma, can not eat immediately, after doing colonoscopy within 12 hours after eating is prohibited, if there is no abdominal pain and other symptoms of discomfort, 12 hours later you can eat noodle soup and other fluids, semi-fluid food, avoid eating sweet potatoes, spinach and other foods with high content of fiber, so as not to accelerate the gastrointestinal tract peristalsis, diarrhea and other symptoms. After doing colonoscopy should be under the guidance of the doctor according to their own situation for a reasonable diet, do not eat randomly, in order to avoid diarrhea and other adverse reactions.