ObjectiveTo evaluate the effect of preoperative regional intraarterial infusion chemotherapy on the prognosis of advanced gastric cancer. MethodsThe clinical data of 80 patients who underwent curative resection for advanced gastric cancers were summarized.Among them,33 patients carried out preoperative regional intraarterial infusion chemotherapy were as the interventional chemotherapy group,and the remaining 47 patients were the control group.Eleven factors including clinical and pathological data,treatment procedures and molecular biological makers that contributed to the longterm survival rate were analyzed by Cox multivariate regression analysis.ResultsThe 5year survival rate of the interventional group was 59.3%,and the control group 47.6%.There was significant difference between two groups (P<0.05).Multivariate regression analysis revealed that the preoperative regional intraarterial infusion chemotherapy was one of the independent factors affecting the longterm survival of patients with advanced gastric cancers.ConclusionThe preoperative regional intraarterial infusion chemotherapy has important value for improving the prognosis of gastric cancer.