Lung infection foci are the changes caused by lung tissue damage when pathogenic bacteria invade the lungs, and they are called lung foci, such as patchy, cloudy, silver tree-like divisional foci visible during CT chest examination, and foci that can also show hairy glass-like and ground glass-like changes, as well as foci that can be accompanied by fibrotic lesions and show striated shadows, and also cavity formation, etc. The appearance of such conditions all require Standardized anti-tuberculosis treatment is required. At present, the main anti-tuberculosis drugs are isoniazid, rifampin, pyrazinamide, ethambutol, etc. The application should follow the principles of early, regular, rational, and full-layer combination treatment, and the goal of treatment is not only to sterilize and inhibit the occurrence of drug resistance, but also to eliminate relapse.