In clinical practice, sodium chloride injection can be used to replenish blood volume and sodium ions, as well as for various kinds of salt-deficient dehydration disorders, such as those caused by common clinical diseases, such as extensive burns, severe vomiting, diarrhea, profuse sweating, and bleeding. In addition, when the body is bleeding heavily and there is no way to transfuse blood within a short period of time, sodium chloride injection can be temporarily administered to maintain blood volume for first aid. There is also the summer labor under high temperature, a lot of sweating will lead to the body lost a lot of sodium chloride, and it is easy to suffer from heat stroke, in this case, you can add 0.1%-1% sodium chloride in the drinking water, with boiling water to take, can be a good timely replenishment of the body’s lost fluids. There is also sodium chloride, which can also be configured into physiological saline, which is often used in clinical applications such as wound cleaning.