The principles of correct fluid replacement in shock, if the patient in shock is sent to the hospital after, the principles adopted include: 1, first fast and then slow: that is, within half an hour or even an hour, 50% of the entire volume of fluid loss must be put in. If the patient’s blood loss has exceeded 1,000 ml, 500 ml or even 1,000 ml of fluid must be infused within half an hour. After filling in this part of the liquid, it will be gradually slowed down later; 2, first crystal and then colloid: crystalloid refers to the usual infusion of fluids, such as saline, such as the balance of the liquid lactic acid Ringer’s solution, acetic acid Ringer’s solution, which are crystalloid fluids. Sugars such as glucose do not belong to crystalloid. Colloid refers to artificial colloid or natural colloid, artificial colloid like 706 substitute plasma, hydroxyethyl starch, and polygelatin peptide, these are artificial colloid, and natural colloid, which is plasma, and albumin, which is natural colloid. In the process of replenishment, the crystal and colloid is a certain proportion, this proportion is also in accordance with the content of the lost, the loss of liquid in the end to determine what; 3, see the urine to replenish potassium: the lack of what to make up for what, how much need to make up for how much, but also to take into account the heart and lungs and other important organs.