The first step in rescuing diabetic ketoacidosis is to clarify the diagnosis and give the patient adequate rehydration. 1. oral rehydration, if oral rehydration is not possible, gastric tube nasal feeding, intravenous saline, glucose, if the blood sugar is lower than 13.9 mmol/L, the patient can be given sugar plus insulin. If blood glucose is higher than 13.9mmol/L, saline plus insulin can be used, and the amount of rehydration should generally be more than 60% of the lost blood volume in the first 24 hours (of course, attention should also be paid to the patient’s heart function tolerance), and the speed can be slowed down later. 2. Insulin treatment can also be pumped by micropump or intravenous drip, so that blood glucose can drop steadily. 3.To correct electrolyte imbalance, potassium can be given to the patient, note that if the blood concentration of potassium may be high or higher than 5.3mmol/L at the onset, potassium can not be given first, record the patient’s urine volume, so that potassium can be given in the urine. 4.If the acidosis is very obvious and the metabolic acidosis is not relieved after the above treatment, the patient can be given The patient can be given a small amount of alkaline rehydration solution, actively treat the primary disease and prevent complications.