Pulmonary calcification foci are old lesions, benign changes, and not serious. They are commonly found in calcified lesions caused by incomplete absorption of tuberculosis after treatment, and also in people who have been exposed to dust for a long time, such as those working in masons and coal mines. Calcified lesions can be formed when large amounts of silica are deposited in the lungs. After standardized treatment of pulmonary tuberculosis, polymorphic lesions such as proliferation, fibrous cords, and calcification are formed in the lungs, and calcified foci are the most common. It is common to see focal resorption of tuberculosis itself, as well as calcification in the hilar lymph nodes, which is not serious at this time, has no clinical symptoms, and does not affect lung function. Imaging calcified foci can exist for a long time and do not disappear easily, and dynamic follow-up is possible. Therefore, pulmonary calcification foci indicate old changes, which have no special clinical significance and do not require special treatment, but only dynamic follow-up.