The day before the colonoscopy, you should mainly eat light food, preferably pasta-based, you can drink millet porridge, rice porridge, white noodle soup, as well as lumpy soup, soft noodles, hairy steamed buns, etc. Do not eat foods with high fiber such as green vegetables and fruits, and do not eat meat, fish, eggs and other foods. In addition, it is not recommended to eat too much or too full, as this will affect the effect of inducing diarrhea, especially the night before when it is generally recommended to eat seven minutes full. For the cleanliness of the intestinal tract, in addition to the dietary requirements, it is also important to drink cleansing medicine and water, which must be taken orally on time and in quantity according to the doctor’s instructions in order to cleanse the intestinal tract and perform better examinations.