Inflammatory pseudotumor of the lungs can be larger than 5 cm, which is related to the extent of non-specific granulomas formed after inflammatory damage to the lung tissue, and requires a comprehensive diagnosis. Inflammatory pseudotumor of the lung is mainly related to the formation of granulation tissue, local tissue fibrosis and connective tissue proliferation during the recovery of inflammatory lesions. Inflammatory pseudotumor larger than 5 cm can be formed when the inflammatory injury is more severe, and the scope of the lesion formed after mechanization is larger, which needs to be diagnosed comprehensively by combining with the CT examination, clinical symptoms, and puncture biopsy. Most of these lesions are chronic inflammatory lesions that cannot be fully recovered after simple anti-inflammatory treatment, and most of them require radical resection through surgery if they are to be completely cured. Inflammatory pseudotumor of the lungs with obvious chest pain, cough or even coughing up blood, need to consult a doctor in time, under the guidance of the clinician for standardized treatment.