The calculation of weight of diabetic patients is as follows: 1, standard weight: height – 105 = standard weight, such as height 175cm patients, the standard weight should be 70kg, on the basis of 70kg up and down 10% are within the normal range. But weight more than 10% is called overweight, more than 20% is called obese, below the standard weight 10% is called underweight, below 20% is called wasting; 2, body mass index: body mass index = weight ÷ height ², such as 60kg patient height 1.75m, BMI in 18.5-23 is normal, > 23 is called overweight, > 25 is called obese, < 18.5 is called wasting. Calculating the patient's weight is mainly to estimate the total daily calorie intake of diabetic patients. Daily labor can be divided into light labor, medium labor and heavy labor, with different degrees of labor and different corresponding calorie supply, for example, the supply for light laborers with normal weight is 30kcal/(kg-d). If the patient has a normal weight of 70kg, he needs 2100cal of total energy per day, and then the total energy is calculated separately according to the ratios of carbohydrates, proteins and fats to calculate the quality of different types of nutrients that the patient should consume daily, and then the base value of nutritional intake is calculated.