Abstract: Objective: To analyze the CT manifestations of pulmonary inflammatory pseudo tumors.Methods: The data of 32 cases with pulmonary inflammatory pseudo tumor,which proved pathologically after surgey were investigated retrospectively.Results: The lesions wryer usually located at the periphery,the base of the lesion were extensively adhesive to pleural with localized pleural thickening,most of them were round or round-like mass,margin was smooth,density was homogeneous,diameter was around 2cm-5cm;the edge of lesion presented long and thick speculations,or shallow lobulation,and mediastinal lymphadenectasis.Conclusion: It is very helpful to diagnostic and differential diagnosis of pulmonary inflammatory pseudo tumor by analyzing the CT features all sidedly and emphasis on the history of infection of patient.