Good control of blood sugar, timely prevention of infection and other incentives are the main preventive measures. Diabetic ketoacidosis is the most common acute diabetic complication, which is characterized by hyperglycemia, ketosis and acidosis. It is a serious metabolic disorder syndrome caused by the combined action of insulin deficiency and insulin antagonistic hormone excess. Ketone bodies include beta hydroxy acid, acetoacetic acid and acetone. Type 1 diabetic patients tend to have spontaneous ketoacidosis, while type 2 diabetic patients occur under certain inducements. The most common inducement of diabetic ketoacidosis is infection, and other inducements include the interruption of insulin treatment or inappropriate reduction, various stresses, alcoholism, and certain drugs.