Diet is about scientific collocation and reasonable balance. Eating oats at night is good for your health if it is reasonably matched, but not good for your health if it is not reasonably matched. Scientific collocation, reasonable balance: “Dietary Guidelines for Chinese Residents 2022” suggests that a balanced diet needs to be “food variety, reasonable collocation”, and recommends that every day, every meal of the diet should generally include cereals and potatoes, vegetables and fruits, livestock, poultry, fish, eggs, milk and soybean food, which is the basic requirement of a balanced dietary pattern. Eat oats at night, with reasonable, good for health, oats belong to the cereal food, eat oats at night, if the same meal together with the intake of vegetables, livestock, poultry, fish, eggs and milk and soybean food, reasonable collocation, good for health. For example, oatmeal porridge + steamed bread + cabbage fried tofu + eggplant melon, composed of a meal, it is more reasonable, but pay attention to scientific cooking, less oil, less salt, food is not full. Eat oatmeal at night, with unreasonable, on the health is not good, such as oats + steamed bread + salted vegetables, is not a reasonable combination, less vegetables and high-quality protein foods, on the health is not good. It is recommended to have a balanced diet and reasonable combination to ensure the health of the organism.