1.Reasonable collocation of staple food and non-staple food. Everyone should eat a certain amount of staple food and non-staple food every day, not just staple food or non-staple food. It is considered that an adult male engaged in light manual labor should generally eat 500g of staple food, animal food100g, 50g of bean food, 500g of vegetables, 20g of cooking oil and 5-8g of salt every day, which can basically meet the nutritional needs. 2. Scientific collocation of staple food. There are many kinds of staple foods, and the nutrients they contain are also different. We should pay attention to the complementary function of protein in food, reasonably match all kinds of staple foods, and often change the pattern, change the taste and enhance the appetite. For example, white flour and corn flour are combined to make flower rolls, rice and mung beans and adzuki beans are combined to stew rice and porridge, pie with corn flour porridge, steamed buns with millet porridge and noodle soup. 3. Scientific collocation of non-staple food. There are many kinds of non-staple food, including meat and vegetables. The most important thing is to eat a certain number of meat dishes and a certain number of vegetarian dishes in proportion every day. Eating fish and meat every meal is not necessarily good, and eating vegetables every meal instead of meat is not in line with the needs. In addition, a balanced diet also requires regular and quantitative meals, and you can't be hungry and full.