Intravenous hyper-nutrition is mainly used for nutritional supplementation in patients with nutritional disorders, commonly in patients who cannot eat in the gastrointestinal tract or in patients who have undergone gastrointestinal surgery. Intravenous hyper-nutrition is the preparation of various nutrients such as fat milk, amino acids, protein, glucose, including multivitamins, into a large nutritional solution, also called 3L bag, to give intravenous infusion. When configuring the nutrition solution, we must pay attention to the osmotic pressure of the nutrition solution, and if necessary, we should puncture the deep vein to give the deep vein nutrition solution to prevent the patient’s blood vessels from being damaged.