Clinically, diabetic malnutrition is characterized by weight loss, physical strength loss, weakened immunity, and in severe cases, hypoproteinemia, anemia, infection and other symptoms. The common causes of diabetic malnutrition are the following 2: 1. Diabetic patients with overly strict dietary control and inadequate intake of nutrient elements can lead to nourishing malnutrition. 2. Diabetic patients with combined diabetic nephropathy, increased urinary protein loss and increased loss of nutrient elements can lead to hypoproteinemia. Patients often because of insufficient intake, can aggravate the lack of nutrient elements, which leads to malnutrition, hypoproteinemia, anemia. The clinical manifestations of diabetic malnutrition need to be addressed with respect to the patient’s etiology. If there is malnutrition due to dietary control, the diet needs to be adjusted to increase protein intake to bring the patient’s weight back to the standard weight. For patients with diabetic nephropathy, standardized urinary protein reduction and renal preservation therapy should be given as early as possible to avoid the occurrence of severe malnutrition.