The normal value of blood potassium is 3.5-5.5 mmol/L. Hyperkalemia is considered when the blood potassium concentration is greater than 5.5 mmol/L. Hyperkalemia affects the electrophysiological stability of nerves and muscles in a life-threatening manner and requires immediate treatment. The treatment of hyperkalemia is mainly as follows: i. Avoid high potassium diet, discontinue potassium-containing drugs, avoid inputting stock blood, etc. Second, glucose solution plus insulin intravenous drip can promote the transfer of potassium ions into the cells. Third, intravenous injection of 5% sodium bicarbonate is good for hydrogen-potassium exchange and promotes potassium ions into the cells, which is good for lowering blood potassium. IV. Intravenous injection of calcium gluconate to counteract the damage of potassium ions to the heart muscle. If necessary, hemodialysis treatment should be given to lower the blood potassium. Treat the possible causes of hyperkalemia, such as renal insufficiency.