Aims:Objective to explore the influence of family enteral nutrition support on nutritional status, lung function, activity tolerance and quality of life in elderly patients with chronic obstructive pulmonary disease (COPD) in stable stage and malnutrition. Methods: a total of 165 elderly patients with COPD and malnutrition discharged from the geriatric department of our hospital were randomly divided into two groups: control group (82 cases) and observation group (83 cases). The control group was treated with conventional diet, and the observation group was treated with conventional diet + enteral nutrition suspension (nengjin, 500kcal / bottle, newdisia Pharmaceutical Co., Ltd.) for support. One month later, they were observed The body mass index (BMI), serum albumin (ALB), total protein (TP), hemoglobin (HB), pulmonary function of the two groups were observed: forced vital capacity (FVC), forced expiratory volume (FEV1) in the first second, FEV1 / FVC, FEV1% of the predicted value (FEV1%), exercise tolerance and quality of life.Results (1) compared with the control group, BMI and ALB in the observation group increased significantly (t = 10.465, 6.189, P < 0.05), TP and Hb had no significant change, and the difference was not statistically significant (t = 1.310, 1.302, P > 0.05). (2) compared with the control group, FVC, FEV1, FEV1 / FVC, FEV1% in the observation group increased, with statistical differences (t = 11.999, 19.654, 13.418, 16.924, P < 0.05). (3) compared with the control group, the quality of life symptom score, activity score, influence score and total score of the observation group decreased significantly (t = 15.303, 6.773, 23.600, 14.766, P < 0.05), and 6MWT increased significantly (t = 111.962, P < 0.05).Conclusion enteral nutrition support can improve the nutritional status, lung function, activity tolerance and quality of life of elderly patients with COPD in stable stage and malnutrition.