The clinical symptoms of pseudotuberculosis nodular disease are mainly cough, shortness of breath, and low fever. The images show speckled nodular shadows in both lungs, a small amount of fluid in the right pleural cavity, a positive reaction on the PPD skin test, and a strong positive pleural fluid TB antibody. The differential diagnosis should be noted in clinical practice. Specifically as follows. 1, chronic bronchitis: the symptoms of chronic bronchitis in the elderly resemble slow fibrous cavity type tuberculosis, but the former X-ray examination only shows deepened or normal lung texture; the latter X-ray shows tuberculosis foci and positive sputum tuberculosis bacilli. 2, bronchiectasis: with a history of chronic cough, cough and repeated hemoptysis, it must be distinguished from slow fibrous cavity pulmonary tuberculosis. However, in bronchiectasis, sputum is negative for tuberculosis, and X-ray plain film shows no abnormal findings or only localized thickened lung texture or curly shadows, and bronchography can confirm the diagnosis. 3, lung abscess: infiltrative pulmonary tuberculosis with cavitation must be distinguished from lung abscess. Pulmonary tuberculosis usually occurs in the upper lobe above and below the clavicle or in the dorsal segment of the lower lobe. However, special attention should be paid to differentiate lower lobe pulmonary tuberculosis from lower lobe lung abscess. The latter has a more acute onset, high fever, pus sputum, no tuberculosis in the sputum but a variety of other bacteria, increased blood leukocyte count and neutrophils, and effective antibiotic therapy. Chronic cavitary pulmonary tuberculosis with secondary infection is easily confused with chronic lung abscess, which is sputum negative for tuberculosis.