Objective To observe the influence of modified-liujunzi-decoction combined with Oral nutritional supplements(ONS) on the nutrition status and lung function in patients with chronic obstructive pulmonary disease(COPD). Methods 40 patients of COPD stable phase with malnutrition were divided into two groups and each group with 20 cases. On the basis of the control group, the experimental group was given again modified-liujunzi-decoction and ONS. All cases were tested before and 3 months after treatment, for detecting the nutrition related index and lung function index; T-test was used for data statistical analysis. Results ①3 months after treatment, the body weight, serum albumin, prealbumin and lung function index of the experimental group were significantly improved compared with those before treatment (P<0.05). ②Compared with the control group, the serum albumin, prealbumin and hemoglobin were significantly increased in the experimental group (P<0.05), and lung function was also significantly improved (P<0.05). ③After treatment, the mid-arm muscle circumference (MAMC), triceps skinfold thickness (TSF) comparison of intra group and intra group differences were not statistically significant(P>0.05). Conclusion Modified-liujunzi -decoction combined with oral nutritional supplements help to increase body weight, protein, and improve nutritional status in patients of COPD stable phase with malnutrition, thereby increasing their respiratory muscle reserve and improving lung function.