For hyperkalemia in children, the following supplementation methods can be used: first, oral potassium supplementation can be given to children. If a child’s hyperkalemia is not very severe, it can be treated with oral potassium chloride, which is safer to take orally. Some children may experience uncomfortable symptoms such as vomiting, and only small amounts need to be given to the child several times. Secondly, intravenous potassium supplementation is needed. If the symptoms of hyperkalemia in children are very severe, intravenous potassium supplementation, such as intravenous potassium chloride, should be given promptly. The concentration of potassium supplementation should not be too high, if the concentration is too high, it will stimulate the heartbeat of the child and even cause serious adverse reactions such as cardiac arrest.