An analysis of results of surgical treatment of chronic duodenal obstruction in 95 patients with duodenal and gastric ulcer was carried on. The method of operation was selected for every patient according to the phase of disease. The Strong method of operation + the resection of a gastric stomach on Hofmeyster-Finsterer method were selected for compensated phase of chronic duodenal obstruction in patients with duodenal and gastric ulcer. The antiperistaltik duodenojejunostomy on Y.D. Vitebski + the resection of a gastric stomach on Hofmeyster-Finsterer method were selected. For sub- and decompensate phase of chronic duodenal obstruction. Long-term results were studied in 80 patients. In compensated phase excellent and good long-term results were noted in 56 patients and unsatisfactory results were noted in 2 patients. In sub- and decompensate phase excellent and good long-term results were noted in 21 patients and unsatisfactory result was noted in 1 patients.