Objective: To investigate the clinical effect of Baihe Gujin decoction for treating stabilization period of chronic obstructive pulmonary disease (COPD). Method: One hundred cases in stable period of COPD by diagnostic criteria

with the lung yin deficiency syndrome

were randomly divided into treatment group and control group (n=50 each). The control group was treated with western medicine

and the treatment group was treated with routine therapy and Baihe Gujin decoction. The clinical symptoms

signs

symptoms and pulmonary function in the two groups were observed before and after treatment. Result: In observation group

the total efficiency of 90% was better than 74% of control group (P<0.05). After treatment

the respiratory symptoms and diseases affecting the activities of 3 dimensions and total score of St George's respiratory questionnaire (SGRQ) in the treatment group were lower than those in the control group (P<0.05). After treatment in the two groups

the forced expiratory volume in one second (FEV1) was significantly increased

the treatment group increased more obvious (P<0.05). After treatment FEV1/forced vital capacity (FVC) in the treatment group was higher than that in the control group (P<0.05). After treatment lung yin deficiency score in the treatment group was significantly lower than that in the control group (P<0.05). Conclusion: Baihe Gujin decoction could improve the stable stage of COPD with lung yin deficiency syndromes

improve the clinical symptoms and lung function

improve patients' quality of life.