Interstitial lung fibrosis is a respiratory disease, the main cause of which is tissue fibrosis caused by interstitial lung lesions.CT manifestations are as follows: 1, small nodular shadow, smaller nodular shadow can be seen on CT, local alveolar septum has a significant thickening, or the alveolar cavity is seen to be blocked; 2, ground glass-like shadow, which is a more common CT manifestation, the entire lung tissue can be seen to be a uniformly misted This is a more common CT manifestation in which the entire lung tissue is seen as a homogeneous, thin, foggy pattern with reduced translucency, and the texture of the blood vessels or bronchi is visible in the area and is not completely obscured; the ground glass-like changes reflect thickening of the alveolar septa or partial filling of the air spaces; 3, grid-like changes, which are irregular, linear or grid-like shadows, mainly reflecting the thickening and edema of the lobular septa or pulmonary fibrosis; 4, traction bronchodilatation shadows are peripheral bronchial branches that are It is mainly caused by the formation of scar tissue after pulmonary interstitial fibrosis; 5, cellulite-like changes, cellulite-like changes are the late CT manifestation of pulmonary fibrosis patients, mainly in the destruction of the entire alveolar structure, showing cellulite-like changes on the CT film, this change is most obvious in the bilateral lower lung lesions.