Idiopathic pulmonary interstitial fibrosis is a refractory disease. The pathogenesis is complicated. Specific therapy is lacked. Based on Chinese medicine theory of collateral disease

the authors explore the treatment and prevention of this disease. As for treatment

the authors emphasize the following principles

i. e. collateral disease runs throughout the therapy; removing obstruction in collaterals is the first; As for Qi and Yin deficient

the principle is treating lung and spleen; If the case is complex

lung

spleen and kidney should be mainly treated; Herbs of removing obstruction in collaterals should be used reasonably. As for prevention

conforming to four seasons and preventing exogenous diseases should be paid attention. Regulating mentality

aviding excessive emotion. Herbs could be used for regulating and nourishing. Work and rest should accord to schedule.