To evaluate the efficiency of Danhong injection in the treatment of pulmonary heart disease.Methods：A randomized, positive drug controlled clinical trial design was used. Eighty patients who were diagnosed clinically as pulmonary heart disease were randomly divided into two groups. Forty patients in the control group were treated with conventional therapy. Forty patients in treatment group were treated with Danhong injection combined with western medicine. The symptoms and signs, pulmonary functions, ultrasonic cardiogram, blood gas analysis as well as change in six-minute-walk distance of the patients before and after the treatment were observed.Results：The total effective rate in clinical syndrome in treatment group was significantly higher than that in the control group (P<0.05).And other factors in two groups of patients were compared. The results showed that the PaO2, PaCO2, PASP, FEV1%, FEV1/FVC and 6HWD of observation group was significantly higher than the control group (P<0.05).Conclusion：Danhong injection can relieve different symptoms of chronic pulmonary heart disease and effectively improve pulmonary function, decrease pulmonary artery pressure and increase exercise tolerance.