Purpose of the research. To study the effect of nutritional support on the results of treatment of patients after liver resection for its focal neoplasms.Materials and methods. Nutritional status at the pre- and inpatient stages was studied based on the examination of 74 patients with focal liver neoplasms. Through a comprehensive clinical and laboratory examination, were identified groups of patients with mild, moderate and severe malnutrition were identified. Comparison groups were formed from them to develop corrective measures aimed at minimizing the phenomena of nutritional deficiency and reducing the frequency ofpurulent- septic complications from wounds.Results. As a result of the study, it was revealed that after undergoing large and extended liver resections, a mild degree of malnutrition was noted in 18 (47.4%) patients in the main group and in 16 (44.4%) patients in the control group (p = 0.796). The average degree of malnutrition was recorded in 7 (18.4%) patients in the main group and in 5 (13.9%) patients in the control group (p = 0.641). Severe malnutrition was observed in 3 (7.9% and 8.3%, respectively) patients in the analyzed groups (p = 0.796). It has been proven that the use of ATP allows accelerating the normalization of nutritional status in patients who underwent liver resection, compared with patients who did not receive nutritional support, up to 5.5 ± 2.2 days compared to 12.8 ± 3.9 in the second group (p <0.001). Nutritional support with the use of enteral nutrition on day 2 after surgery makes it possible to improve PS markers, which, as a result, helps to reduce the number of septic complications by 9% in the main group.Conclusion. The use of ATP allows to normalize the nutritional status in patients who underwent liver resection, compared with patients who did not receive nutritional support, up to 5.5 ± 2.2 days compared to 12.8 ± 3.9 in the second group (p < 0.001). After liver resection in the early postoperative period, nutritional support with enteral nutrition on day 2 after surgery allows improving PS markers, which, as a result, helps to reduce the number of purulent- septic complications by 9% compared to patients who did not receive nutritional support.