The dysfunction of qi transformation in sanjiao was the fundamental pathogenesis of idiopathic pulmonary fibrosis（IPF）. Regulating sanjiao

benefiting qi and warming yang must be through in the whole treatment process of IPF. In the early stage

it should be to warm yang and disperse cold

and to regulate sanjiao. In the middle stage

it should be to relax qi movement

to dissipate phlegm and dispell stasis. In the late stage

it should be to strengthen vital qi and to consolidate body resistance

and to clear away the remaining pathogen. To regulate the upper jiao is to purge the lung qi

to regulate the middle jiao is to warm the spleen and stomach

to regulate the lower jiao is to calm the kidney qi. If qi transformation in sanjiao is unblocked

qi and yang can be cultivated

and blood stasis

phlegm and toxin can be dissipated.