The invention discloses a 
traditional Chinese medicine composition for treating idiopathic pulmonary arterial hypertension. The 
traditional Chinese medicine composition comprises, by weight, 2-3 parts of white 
muscardine silkworms, 5-10 parts of 
herba cistanche, 5-10 parts of radix angelicae pubescentis, 1-3 parts of 
lotus seed cores, 1-3 parts of 
dogbane leaves, 5-10 parts of lemon, 0.01-0.05 part of mint, 0.01-0.05 part of pig 
lung extract and 0.01-0.05 part of Chinese littleleaf box extract. All the raw materials are prepared, smashed, decocted and extracted, then ethyl 
alcohol is added to serve as a 
dissolution assistant, and a finished product is obtained. By means of the 
traditional Chinese medicine composition, pulmonary arterial hypertension can be reduced, 
pulmonary artery smooth muscle cell proliferation is reduced, blood-vessel-periphery inflammatory cells are obviously reduced, the 
lesion lung tissue structure and 
right ventricular hypertrophy can be improved, alveolar-space 
edema, bleeding and intrapulmonary arteriolar wall and 
smooth muscle hypertrophy can be relieved, pulmonary 
vascular resistance can be improved, idiopathic pulmonary arterial hypertension can be effectively treated, and the 
curative effect is remarkable.