Hypokalemia is very common in clinical settings, and there are mainly two treatment methods. The first one is the oral administration of sustained-release potassium chloride tablets or oral potassium chloride solution. Patients can be advised to consume potassium-rich vegetables and fruits, etc. The second method is intravenous potassium supplementation, which has higher requirements. It is important to monitor the patient's urination; if urination is adequate, intravenous supplementation can proceed, but the concentration of potassium should not exceed 0.3%. After the occurrence of hypokalemia, it is crucial to actively search for the cause and provide symptomatic treatment. Generally, the prognosis for hypokalemia is good.