Idiopathic pulmonary fibrosis(IPF)is a kind of disease characterized by diffuse alveolitis and alveolar structure destruction which finally leading to fibrosis. Its pathogenesis is not thoroughly understood till now. The incidence rate of IPF is about three to five people among ten thousand people. Recently the incidence rate of IPF has trend of increasing, and survival rate in five years is similar with lung cancer. Because of no specific medcine and dissatisfactory effects of glucoco...