Abstract: Objective Approach the radiology and clinical manifestation of pulmonary inflammatory pseudotumor. Methods Radiography and spiral volume scan for the lung of 41 patients. Results Many of the pulmonary inflammatory pseudotumor located in the surrounding of lung. According to the shape of CT, it included nodus (or lump) type and infiltrating type. The mark appearance included peach cusp sign, straight sign, net-spot sign, halo sign and uniform strengthen. It might he useful to the diagnosis when analyze the history and symptom before the shadow occurred in the lung. Conclusion CT imaging presented important value for the diagnosis of pulmonary inflammatory pseudotumor.