Moderate dehydration is a more serious dehydration, in addition to the symptoms of thirst, there is also poor skin elasticity, low urine, which can lead to low blood pressure, and in severe cases, shock symptoms can occur. In this case, we should establish intravenous access as soon as possible and rehydrate as soon as possible, generally within 1-2h, adults should be given about 1000-2000ml of lactated Ringer’s solution to correct dehydration as soon as possible, so that the symptoms of dehydration can be improved as soon as possible and avoid further aggravation of the symptoms of dehydration, which may cause damage to the whole body. At the same time, we should pay attention to the failure disorder, which is often complicated by metabolic acidosis, so we should give alkaline fluid to correct the acidosis and reduce the damage of acidosis to the organism in a timely manner according to the situation. In conclusion, moderate dehydration is a more serious manifestation, which needs to be treated promptly and correctly as soon as possible to reduce further damage to the organism, such as the occurrence of shock, severe dehydration, and irreversible damage to internal organs.