You can eat eight-treasure porridge before colonoscopy, but it is generally not recommended to eat after 8:00 p.m. on the day before colonoscopy. Patients undergo colonoscopy, through the colonoscope to observe the patient’s intestinal wall mucosa, at this time to try to ensure that the intestinal wall mucosa is clean and smooth, to reduce the retention of food residues, to avoid the food cover and affect the results of the examination. Before the colonoscopy examination can generally promote bowel movement through drugs, such as oral polyethylene glycol 4000 bulk for bowel cleansing. Three days before the examination, patients can eat semi-fluid food such as eight-treasure porridge, which produces less food residue and is easy to discharge. However, do not eat after 8:00 p.m. on the day before the colonoscopy, at this time to eat eight treasure porridge, may lead to food can not be discharged in a timely manner, if the patient is too hungry at this time, you can carry on the infusion of fluids, as far as possible, do not drink eight treasure porridge. For specific cases, it is recommended to consult a doctor and take it as prescribed.