The X-ray manifestations of chronic obstructive pulmonary disease are as follows: 1, lung texture changes: lung texture thickening, manifested as more branches, wide range, loss of proportional thickening of the tube diameter, disorderly distribution, distortion, hairy edges, heavy in the middle and lower lung fields; lung texture slim mostly seen in diffuse emphysema, lung texture relatively thin, increased spacing, straighter shape, clear outline; 2, bronchial wall sclerosis, bronchial wall thickening, stiffness, density The lung fibrosis is manifested as striated, lattice-like shadow and dotted nodular shadow; 3, lung lobe translucency changes: lung lobe translucency increases, showing signs of diffuse emphysema, and reduced lung field translucency is due to pulmonary ventilation dysfunction or diffuse interstitial inflammation; 4, diaphragm changes: flat and low diaphragm, and reduced diaphragm motion; 5 Infection: Infectious changes include indirect and substantial infectious lesions, the former manifesting as thickened and blurred lung texture, reduced lung lobe translucency, and increased and thickened hilar shadows; the latter manifesting as patchy, cloudy flocculent shadows of varying sizes, but with a low occurrence rate.