Adequate nutrition plays a major role, both in prevention and treatment of gastrointestinal cancer. There are such factors as the cellulose content in food ration, the consumption of fresh fruits and vegetables, vitamins, physical activity. Cancer cachexia are observed at 70% of oncology patients in the terminal stage of cancer. Purposes of nutritional support are improvement of the quality of life, in particular terminally ill, the reduction of the length of hospital stay and costs of treatment, the prevention infectious and postoperative complications. The preference must be given enteral versus parenteral nutrition. In this work was studied possibilities of nutritional support for correction of malnutrition in the patient with gastrointestinal cancer. It is shown that the enteral nutrition contributes to improvement of nutritional status, prevents development of cachexia, improves the quality of life.