Objective:To compare nutritional status of elder and youth-middle-aged surgical patients both on admission and at discharge,and investigate the rationality of nutritional therapy. Methods:Nutritional risk screening (NRS2002)was applied to investigate 167 cases of newly admitted patients. Then we divided patients into two groups by 65-year-old,including the youth-middle-aged group and the elder group. NRS2002≥3 was set as nutrition risk. The rationality of nutritional support and prognosis were investigated as well. Results: ①NRS score and the proportion of the patients whose NRS≥3 in the elder group were higher than those in the youth-middle-aged group both on admission and at discharge. The patients both in the two groups had poorer nutritional status at discharge. ②23 cases(20%)in the youth-middle-aged group and 12 cases(22%)in the elder group received parenteral nutrition(PN) respectively.The calories total parenteral nutrition(TPN) provided both in the two groups were insufficient. The ratios of insufficient calories providing were 60% in the youth-middle-aged group and 67% in the elder group. The ratio of calories to nitrogen was low. In the patients whose NRS≥3,there were 12 cases (24%)and 11 cases (34%)who received PN support between the two groups respectively. The calories TPN provided both in the two groups were insufficient too. The ratios were 63% in the youth-middle-aged group and 73% in the elder group respectively. The ratio of calories to nitrogen was low too.③Compared with the patients whose NRS≥3 in the youth-middle-aged group,the patients whose NRS≥3 in the elder group had longer hospital stay. Conclusion:The nutritional support therapy should be strengthened while hospitalized. Nutrition support treatment should be supplied to the patients with nutritional risk according to NRS score. The calories TPN provided were insufficient. and the composition was not reasonable. There was a still asingle amino acid infusion in PN.