With the development of social economy and the continuous improvement of people’s living standard, people can obtain and afford more and more kinds of food, but the relative lack of relevant nutrition knowledge has led to a significant increase in the incidence of nutrition-related diseases, especially diabetes, hypertension, coronary heart disease, cerebrovascular disease, gout, kidney disease and other diseases, and these diseases pose a great danger to people’s health and seriously affect the quality of life, and reasonable nutrition has an important role in the treatment and prevention of these diseases. So what is reasonable nutrition? Reasonable nutrition is to achieve a balanced diet, the following balanced diet is introduced as follows: 1. Cereals and potatoes, which mainly provide carbohydrates, proteins and B vitamins as well as dietary fiber, are the main source of dietary caloric energy. In addition, pay attention to the coarse and fine mix, often eat some coarse grains, mixed grains and whole grains. Do not grind rice and wheat too finely to avoid the loss of vitamins, minerals and dietary fiber contained. Adhere to the cereal-based can avoid the drawbacks of high energy, high fat and low-carbohydrate meals. 2, eat more vegetables and fruits and potatoes: fresh vegetables and fruits are an important part of a balanced human diet, and one of the important features of our traditional diet. Vegetables and fruits are low in energy and are an important source of vitamins, minerals, dietary fiber and phytochemicals. Diets rich in vegetables, fruits and potatoes play an important role in keeping the body healthy, maintaining normal intestinal function, improving immunity and reducing the risk of chronic diseases such as obesity, diabetes, hypertension and tumors. Adults eat 300g~500g of vegetables and 200g~400g of fruits every day. 3. Eat milk, soybeans or their products every day: In addition to being rich in high quality protein and vitamins, milk is high in calcium and has a high utilization rate, making it an excellent source of dietary calcium. It is recommended that each person drink an average of 300 ml. of milk per day. Soybean is rich in high-quality protein, calcium, essential fatty acids, vitamins and dietary fiber, and contains phospholipids, oligosaccharides, as well as isoflavones, phytosterols and other phytochemicals. It is recommended that each person consume 30g~50g of soybeans or an equivalent amount of soy products daily. 4, often eat an appropriate amount of fish, poultry, eggs and lean meat: is a good source of high-quality human protein, lipids, fat-soluble vitamins, B vitamins and minerals, is an important part of a balanced diet. Lean animal meat has high iron content and good utilization. Fish is generally low in fat and contains more polyunsaturated fatty acids; poultry is also low in fat and high in unsaturated fatty acids, which has a more important role in preventing and treating atherosclerosis. Eggs are rich in high-quality protein, a variety of nutrients are more complete, is a very economic source of high-quality protein. Should be appropriate to eat more fish, poultry meat, reduce pork intake. It is recommended that 50-100 grams of fish and shrimp, 25-50 grams of eggs and 50-75 grams of poultry and livestock meat per day. 5, reduce the amount of cooking oil, eat light and less salt meals: fat is an important source of energy, and can provide essential fatty acids, and is conducive to the digestion and absorption of fat-soluble vitamins, but excessive fat intake is one of the risk factors for obesity, hyperlipidemia, atherosclerosis and other chronic diseases. Therefore, it is recommended to use no more than 25 grams of oil per person per day for cooking. Edible oils can be chosen from fats such as edible olive oil (containing monounsaturated fatty acids) and tea seed oil (containing n-3 fatty acids). High dietary salt intake is closely associated with the prevalence of hypertension. It is recommended that people limit the amount of salt and can choose to consume low-sodium salt (with the addition of potassium chloride and calcium and magnesium, the salinity is not reduced, while the sodium content is reduced, which is beneficial for blood pressure control and especially suitable for patients with hypertension. For this reason, it is recommended that people should get into the habit of eating light and less salty meals, with 5-6 grams of salt per day. Meals should not be too greasy, not too salty, do not consume too much animal food and fried, smoked and pickled food. 6, in the choice of food, should pay attention to the freshness, a cooking as far as possible within a day to eat, and eat less overnight dishes.