Abstract: Objective: To investigate the effects of simvastatin in the treatment of pulmonary heart disease with heart failure. Methods: Ninety-six patients with pulmonary heart disease complicated with heart failure were randomly divided into observation group and control group( 48 cases each group) . The control group were treated with conventional means， the observation group were treated with simvastatin based on the conventional means. The therapeutic effect，blood gas index and pulmonary artery pressure index of two groups were observed. Results: The blood gas and pulmonary artery pressure indexes of the observation group after treatmet were significantly better than those in control group( P ＜ 0. 01) . The total effective rates of the observation group and control group were 95. 83% and 75. 00%， respectively， the difference of which was statistical significance ( P ＜ 0. 05 ) . Conclusions: Simvastatin can improve the heart function in patients with pulmonary heart disease complicated with heart failure and treatment effects，which has certain clinic application value.